Product research
Specifications, manuals and independent publications used in these comparisons.
Steelcase, Manufacturer specification, Reviewed October 3, 2026
Regular upholstered Amia, distinct from Amia Air. Current page confirms four-dimensional arms, height-adjustable LiveLumbar, manual tension, full recline with upright-only back lock and 400 lb rating. These do not establish medical benefit or subjective comfort. Amazon exact Black Buzz2 4821410 listing independently confirms four-way arms and carpet casters.
Steelcase, Manufacturer specification, Reviewed October 3, 2026
Current US store data confirms standard 16 to 21 inch seat height, overall 26.625 inch width and 21.75 to 24.75 inch depth. Do not transfer optional low, tall or stool cylinders to the selected standard Amazon chair. No shipping weight is used as chair weight.
Steelcase, Manufacturer specification, Reviewed October 3, 2026
Page 20 visually inspected. Standard Amia and Gesture height 16 to 21 inches. Functional depth Amia 15.5 to 18.5 and Gesture 15.75 to 18.5. Amia depth agrees with its separate brochure. Old brochure disagrees on arm minimum, seat width and load, so those arm and width numbers are excluded. Current product page supersedes old 300 lb Amia wording with 400 lb. No precise comfort or body-height prediction.
Steelcase, Manufacturer specification, Reviewed October 3, 2026
Older brochure agrees on standard 16 to 21 inch height and 15.5 to 18.5 depth. Its 300 lb capacity, 13 inch inner-arm minimum and 19.25 inch seat width conflict with later documents. Those conflicting values do not support recommendations or calculations.
Steelcase, Manufacturer specification, Reviewed October 3, 2026
360-degree articulating arms, three recline-angle stop settings plus upright back lock, manual tension and 400 lb capacity. Headrest and additional lumbar are optional. Selected Graphite Gray standard-height Amazon chair is not the headrest configuration. No exact arm-width or comfort advantage is calculated.
Haworth, Manufacturer specification, Reviewed October 3, 2026
Seat height 16.4 to 21, depth 16.25 to 18.75, between arms 17.1 to 20.1, seat width 20, overall width 28 and depth 27 inches. Manual tension and upright back lock. Manufacturer forward tilt is optional and excluded from the selected Mist Amazon configuration. No manufacturer-direct return terms transferred to Amazon.
Haworth, Manufacturer specification, Reviewed October 3, 2026
Seat height 15.5 to 20.5, depth 15 to 17.25, between arms 15.7 to 21.1, seat width 19.5, overall width and depth 28.5 inches. Weight-responsive tension, three-position backstop and 325 lb capacity. No body-weight-adjustment claim transfers to seat height or depth. Package mass is excluded.
Haworth, Manufacturer specification, Reviewed October 3, 2026
Visually reviewed one-page guide confirms lumbar adjustment, seat depth, height, four-dimensional arm controls and three-position backstop. Marketing references to a contoured built-in back do not mean that the lumbar adjustment is absent.
OSHA, Third-party source, Reviewed October 3, 2026
General setup principles only. Adjust chair together with desk, keyboard and monitor. Feet need support, knee contact must be avoided and armrests must allow close desk approach. A footrest may be needed when lowering the chair would leave the work surface too high. No product endorsement or treatment claim.
HINOMI US on Amazon, Product listing, Reviewed October 4, 2026
Selected Black standard X2 Pro, new offer from HINOMI US checked through API and browser. Exact listing specifies 3.2 inches of seat-depth travel and 2.5-degree forward seat tilt, with headrest and legrest included. Manufacturer title and SKU X2PRO-BLK corroborate generation. This retailer evidence is not transferred to original X2 or X1.
Steelcase, Manufacturer specification, Reviewed October 4, 2026
Fixed functional seat depth 17.25 inches. Weight-activated recline with normal, boost, mid-stop and upright settings. Four-dimensional arms with 2 inches of retraction. Optional lumbar is not established as included in the selected Amazon black configuration. No headrest selected. US mechanism facts are separate from the matching EU finish photograph.
Steelcase, Manufacturer specification, Reviewed October 4, 2026
Weight-activated recline with 20 percent boost, mid-stop and upright lock. Four-dimensional arms and adjustable lumbar. Selected Amazon Era Onyx chair has the quilted upholstered back. Do not transfer 3D-knit back photographs or weights.
Steelcase, Manufacturer specification, Reviewed October 4, 2026
Manufacturer-hosted 2022 US guide corroborated by current Think controls page. Seat-depth adjustment and 3-inch arm retraction. Hard casters are for carpet. Soft casters are the hard-floor option. Older weights and back dimensions are not used for the 2024 quilted package.
Steelcase, Manufacturer specification, Reviewed October 4, 2026
Seat depth and height controls, manual tension, three recline stop settings plus upright lock, articulated 360-degree arms. Additional lumbar and headrest are optional. Selected Graphite Gray Amazon package has no headrest. No medical or measured comfort outcome inferred.
Steelcase, Manufacturer specification, Reviewed October 4, 2026
Regular upholstered Amia, manual tension, upright-only lock, four-dimensional arms and height-adjustable LiveLumbar. Amia Air is a different back. Selected new Black Buzz2 4821410 package independently verified.
Herman Miller, Manufacturer specification, Reviewed October 4, 2026
Exact AS1SA22HFN2BKBBBKBK9201 decodes to standard cylinder, tilt limiter, height-adjustable arms, fixed seat depth, no extra lumbar, black frame and carpet casters, Crepe Licorice. Optional forward tilt and fully adjustable arms are excluded. Maker fixed depth 16 inches and Amazon 16.5 conflict, so no numerical fixed-depth fit claim is made.
Herman Miller, Manufacturer specification, Reviewed October 4, 2026
Auto-Harmonic tilt without manual tension or tilt lock. Fixed seat depth. Selected Amazon mid-back Graphite package has height-adjustable arms and carpet casters, not Leaf arms. Store depth 15.5 inches and current specification page 15.9 conflict. No numerical depth comparison is made.
Branch, Manufacturer specification, Reviewed October 4, 2026
Original Pebble / White / Standard, exact barcode 810061416456, without optional headrest. Removable 3D arms adjust height, width and depth. Manual tilt tension, seat-depth control, height-adjustable removable lumbar. 275 lb capacity and 27.6-inch base diameter. Published 18 to 22 inch depth uses an unclear measurement basis, excluded from cross-brand depth calculations.
Branch, Manufacturer specification, Reviewed October 4, 2026
Pro has arm height and width plus pad width, depth and pivot, lumbar height and depth control and forward tilt. Exact selected Shore Mesh V2 Amazon title corroborates forward tilt. Manufacturer explicitly confirms a high-density foam seat, including the mesh-back configuration. Shore Mesh does not mean a suspended mesh seat. Optional headrest is not included. No numerical fit advantage inferred from adjustment count alone.
Branch, Manufacturer specification, Reviewed October 4, 2026
Height-only floating arms, removable. Adjustable depth, lumbar height and manual recline tension. Standard seat height 16.5 to 20.5 inches and depth 16.5 to 19. No width or pivot arm control assumed. Selected Galaxy package does not include the optional headrest.
Haworth, Manufacturer specification, Reviewed October 4, 2026
Seat-depth range 16.25 to 18.75 inches, manual recline tension and upright lock. Four-dimensional arms and adjustable lumbar confirmed in selected Mist package. Optional forward tilt excluded. Manufacturer-direct return terms do not establish marketplace return terms.
Haworth, Manufacturer specification, Reviewed October 4, 2026
Weight-responsive recline, three-position backstop, adjustable lumbar and four-dimensional arms. Seat depth 15 to 17.25 inches. Whole-chair width 28.5 inches. Automatic tension does not adjust height or seat depth. Selected Coal/Black package verified as new.
HINOMI, Manufacturer specification, Reviewed October 4, 2026
Coal Black cushioned seat, mesh back, flip-up arms and included legrest. Seat-depth travel 6 cm and height travel 9 cm. Lumbar height travel 4 cm and depth 2 cm. Lockable recline up to 135 degrees. 275 lb rating. No pain relief, posture correction or warranty duration inferred from marketing.
HINOMI, Manufacturer specification, Reviewed October 4, 2026
Page URL retains x2, selected title and variant SKU X2PRO-BLK establish X2 Pro. Four-panel back, six-dimensional arms, adjustable lumbar and included dual-panel legrest. Selected Amazon package corroborates 3.2-inch seat-depth travel and 2.5-degree forward seat tilt. Some legacy X1 image alt text and adjustment counts are excluded. 330 lb rating.
SIHOO, Manufacturer specification, Reviewed October 4, 2026
Black standard version without footrest. Six-dimensional flip-up arms, weight-adaptive tension, 105/120/135-degree locks, 16.5 to 18.5 inch seat depth and 19.1 inch width. Lumbar height 2 inches and depth 0.8 inches. Chair weight 43.7 lb, capacity 330 lb. Footrest version is a separate package.
SIHOO, Manufacturer specification, Reviewed October 4, 2026
US selected Black S100 with polished base. Seat depth 15.15 to 17.12 inches, 1.97 inches of travel. Four-dimensional arms, five upper-back positions, split dynamic lumbar panels. 330 lb rating. UK enlarged-cushion dimensions and 300 lb rating do not apply. No separate footrest included.
SIHOO, Manufacturer specification, Reviewed October 4, 2026
Pro V2 seat depth 16.9 to 18.5 inches, width 20.5, weight-adaptive mechanism, three lumbar support levels, 8D arms with rear-pad tilt and swing-away movement, 105/120/135-degree locks. 59.64 lb chair weight. Official comparison identifies original C300 fixed seat depth. Original selected Amazon C300 has older 3D arms, so newer arm features are not transferred.
Haworth, Manufacturer specification, Reviewed September 19, 2026
Checked seat dimensions, manual tilt tension, upright lock and optional equipment. Forward tilt is not assumed included on the Amazon configuration.
Haworth, Manufacturer specification, Reviewed September 19, 2026
Checked seat depth, height, 4D arms, weight-activated recline and 325 lb rating.
Steelcase, Manufacturer specification, Reviewed September 19, 2026
Checked separate lower-back firmness, lumbar height, 4D arms and recline stops. Selected catalog product is the upholstered standard Leap, not Leap Plus.
Branch, Manufacturer specification, Reviewed September 19, 2026
Checked removable lumbar with height and depth adjustment, 5D arms, forward tilt, 275 lb rating and optional headrest.
Branch, Manufacturer specification, Reviewed September 19, 2026
Checked six adjustment points, height-only arms, adjustable seat depth, 3D-knit back and 275 lb rating.
Branch, Manufacturer specification, Reviewed September 19, 2026
Checked fixed seat depth, height-adjustable arms, 225 lb rating and selected vegan-leather finish.
SIHOO, Manufacturer specification, Reviewed September 19, 2026
Checked 16.9 to 18.5 inch seat-depth range, 20.5 inch seat width, 330 lb rating, mesh seat and back, 8D arms and supplied headrest.
SIHOO, Manufacturer specification, Reviewed September 19, 2026
Checked dynamic lumbar, fixed seat depth, mesh seat and mesh back. Adjustment counts can change across regional generations.
SIHOO, Manufacturer specification, Reviewed September 19, 2026
Checked manual lumbar height and depth, 3D arms, mesh seat, fixed seat depth, 126 degree recline and 330 lb rating.
SIHOO, Manufacturer specification, Reviewed September 20, 2026
Current US page specifies padded seat, mesh back, height-only arms, fixed 17.91-inch seat depth, 20.08-inch hip width, 330 pounds and 126 degree recline. Manufacturer black variant image is M18-M148.
SIHOO, Manufacturer specification, Reviewed September 20, 2026
Official manual linked from US M18 product page.
Amazon US, Product listing, Reviewed September 20, 2026
Exact currentAsin and title match. Cookie-free curl HTTP200 with enabled Add to cart and Buy Now submit inputs on 2026-09-20.
Haworth, Manufacturer specification, Reviewed September 20, 2026
15.5 to 18.5 inch seat depth and 16.5 to 21.5 inch height. 350-pound rating without forward tilt, 325 with forward tilt. Optional lumbar and forward tilt not inferred included.
Haworth, Manufacturer specification, Reviewed September 20, 2026
Manufacturer Silver Leaf photograph visually compared with the exact B0C5LCGYDY Amazon primary image. Both show the same Silver Leaf mesh and seat, Fog plastic base, matching controls and no headrest. The maker JSON assigns this photo to no-lumbar and lumbar variants, so the exact no-added-lumbar configuration is established by Amazon contents rather than inferred only from the shared image.
Amazon US, Product listing, Reviewed September 20, 2026
HW-FERN, Silver Leaf, Mesh Without Lumbar Support. Four-dimensional arms, seat depth, manual tilt tension, plastic base, 350 pounds and assembled delivery. Cookie-free exact dp HTTP200 with matching currentAsin and enabled purchase inputs.
SIHOO, Manufacturer specification, Reviewed September 20, 2026
Mesh seat and back, 3D arms, 18.11 inch fixed seat depth, 44.8 pounds, 330-pound rating.
Haworth, Manufacturer specification, Reviewed September 20, 2026
Seat 16.25 to 18.75 inches deep, 16.4 to 21 inches high, 17.1 to 20.1 inches between arms. Manual tilt tension and 350-pound rating.
Haworth, Manufacturer specification, Reviewed September 20, 2026
Seat 15 to 17.25 inches deep and 15.5 to 20.5 inches high. Weight-responsive recline, 325 pounds, four-piece tool-free assembly.
sihoo.com, Manufacturer specification, Reviewed September 9, 2026
16.9 to 18.5 inch seat depth. Mesh back and seat. Headrest and 8D synchronized arms. 105 120 and 135 degree recline stops. 330 lb maximum load. 59.64 lb net weight. Weight-sensing mechanism claim covers 40 to 100 kg
sihoo.com, Manufacturer specification, Reviewed September 9, 2026
3D arms. Manually height and depth adjustable lumbar. Mesh seat and back. 126 degree maximum recline. 330 lb maximum load. No seat-depth slider specified
branchfurniture.com, Manufacturer specification, Reviewed September 9, 2026
14 adjustments. 5D arms. Height and depth adjustable removable lumbar. Forward seat tilt. Optional headrest. Foam seat with mesh-back option. 42 lb weight. 275 lb maximum load
store.steelcase.com, Manufacturer specification, Reviewed September 9, 2026
360-degree arm system with height width depth pivot. 16 to 21 inch standard seat height. 400 lb weight rating. Three recline stops plus upright back lock. Optional headrest
hermanmiller.com, Manufacturer specification, Reviewed September 9, 2026
15 to 18 inch adjustable seat depth. 16 to 20.5 inch standard-height range. 15 to 19 inch low and 17 to 22 inch extended options. 300 lb weight limit. Backfit and layered seat construction
hermanmiller.com, Manufacturer specification, Reviewed September 9, 2026
Work-chair arms adjust vertically and horizontally. 15 to 18 inch seat depth. Work and gaming versions are distinct
steelcase.com, Manufacturer specification, Reviewed September 9, 2026
Standard seat height 16.5 to 21.5 inches. Functional seat depth 15.5 to 17.75 inches in specification guide. 19.5 inch seat width. Other cylinder options exist
store.haworth.com, Manufacturer specification, Reviewed September 9, 2026
15.5 to 20.5 inch seat height. 15 to 17.25 inch seat depth. 19.5 inch seat width. 325 lb maximum load. Weight-activated recline. Four-piece tool-free assembly
steelcase.com, Manufacturer specification, Reviewed September 9, 2026
Height and depth adjustable seat. Adjustable lumbar. 4D arm option. Weight-activated mechanism
hon.com, Manufacturer specification, Reviewed September 9, 2026
300 lb weight limit. Mesh back. Seat-depth arm and lumbar options vary by configuration
Amazon.com, Product listing, Reviewed September 9, 2026
Exact US product listing and selected model.
store.haworth.com, Manufacturer specification, Reviewed September 9, 2026
16.4 to 21 inch seat height. 16.25 to 18.75 inch seat depth. 20 inch seat width. Tilt-tension control. Upright back lock. 4D arms lumbar and forward tilt are configuration options
Amazon.com, Product listing, Reviewed September 9, 2026
Exact US product listing and selected model.
store.steelcase.com, Manufacturer specification, Reviewed September 9, 2026
15.5 to 20.5 inch standard seat height. 400 lb weight rating. Separate lower and upper back firmness controls. Four recline stops plus upright lock
steelcase.com, Manufacturer specification, Reviewed September 9, 2026
Functional seat depth 15.75 to 18.75 inches for standard work chair. Seat width 19.25 inches. Measurements use BIFMA chair-measuring device. Leap Plus and stools have different dimensions
Herman Miller, Manufacturer specification, Reviewed August 31, 2026
Official US product page used for 8Z Pellicle construction, three chair sizes, specifications, assembly status and warranty terms.
Tom's Guide, Third-party source, Reviewed August 31, 2026
Hands-on roundup used to cross-check Aeron size selection, mesh feel, support and long-session comfort.
Herman Miller, Manufacturer specification, Reviewed August 31, 2026
Official US product page used for Backfit, seat-depth controls, dimensions, assembly status and warranty terms.
Igor'sLAB, Third-party source, Reviewed August 31, 2026
Long-form hands-on review used for adjustment learning curve, back movement, seat feel and fit limitations.
Steelcase, Manufacturer specification, Reviewed August 31, 2026
Official product page used for 360-degree arms, seat controls, weight rating and warranty information.
TechGearLab, Third-party source, Reviewed August 31, 2026
Comparative hands-on testing used for comfort, arm performance, adjustment range and observed drawbacks.
Steelcase, Manufacturer specification, Reviewed August 31, 2026
Official product page used for LiveBack, lumbar controls, seat depth, weight rating and warranty information.
TechGearLab, Third-party source, Reviewed August 31, 2026
Comparative hands-on testing used for all-day comfort, lumbar tuning, adjustment range and seat feel.
Steelcase, Manufacturer specification, Reviewed August 31, 2026
Official product page used for seat controls, 4D arms, compact proportions, weight rating and warranty terms.
BTODtv, Third-party source, Reviewed August 31, 2026
Hands-on video review used to cross-check seat comfort, back support, arm movement and value against larger Steelcase chairs.
Haworth, Manufacturer specification, Reviewed August 31, 2026
Official product page used for synchronized tilt, seat-depth control, certifications and construction details.
Office Interiors, Third-party source, Reviewed August 31, 2026
Dealer-authored hands-on review used for adjustment behavior, seat feel, lumbar contact and target-user fit.
Haworth, Manufacturer specification, Reviewed August 31, 2026
Official US store page used for assembly, seat-depth range, body-weight recline, dimensions and load rating.
Sleek Setups, Third-party source, Reviewed August 31, 2026
Hands-on video review used to assess setup, recline behavior, seat comfort and everyday adjustment limits.
HON, Manufacturer specification, Reviewed August 31, 2026
Official collection page used for the mesh-back platform, control options, materials and configuration identity.
Tom's Guide, Third-party source, Reviewed August 31, 2026
Hands-on review used for adjustment count, measured seat range, load rating, comfort and firm lumbar feedback.
Branch, Manufacturer specification, Reviewed August 31, 2026
Official product page used for fourteen adjustments, forward tilt, 5D arms, materials and optional headrest.
TechRadar, Third-party source, Reviewed August 31, 2026
Hands-on review used for long-session comfort, arm stability, assembly and adjustment quality.
Branch, Manufacturer specification, Reviewed August 31, 2026
Official product page used for 3D-knit construction, six adjustments, dimensions, capacity and warranty.
Tom's Guide, Third-party source, Reviewed August 31, 2026
Hands-on review used for design, back support, arm limitations and fit for shorter and taller testers.
Branch, Manufacturer specification, Reviewed August 31, 2026
Official product page used for controls, dimensions, daily-use guidance, load rating and material options.
BTOD.com, Third-party source, Reviewed August 31, 2026
Comparative hands-on assessment used for Daily Chair support, build, simplicity and limits beside Branch models.
Comfort Seating, Manufacturer specification, Reviewed August 31, 2026
Official manufacturer platform page used for Gen2 mechanisms, certification, load rating and adjustment functions. Amazon identity was cross-checked as ME7ERG-GEN2.
CHIP, Third-party source, Reviewed August 31, 2026
Independent test used for mesh comfort, adjustment breadth, lumbar feel and fit observations.
SIHOO, Manufacturer specification, Reviewed August 31, 2026
Official product page used for dynamic lumbar, mesh construction, coordinated arms and recline behavior.
TechRadar, Third-party source, Reviewed August 31, 2026
Hands-on review used for airflow, adaptive support, arm movement and height-dependent lumbar fit.
SIHOO, Manufacturer specification, Reviewed August 31, 2026
Official US product page used for seat-depth range, 8D arms, headrest, recline positions, load rating and availability.
TechRadar, Third-party source, Reviewed August 31, 2026
Hands-on review used for tall-user fit, adaptive support, recline, control complexity and arm behavior.
SIHOO, Manufacturer specification, Reviewed August 31, 2026
Official product page used for mesh construction, 3D arms, lumbar controls, recline range and load rating.
TechRadar, Third-party source, Reviewed August 31, 2026
Hands-on review used for firm mesh feel, comfort, setup, caster quality and overall refinement.
Nouhaus, Manufacturer specification, Reviewed August 31, 2026
Official product page used for 4D arms, headrest, recline locks, aluminum base, dimensions and load rating.
Ergonoma, Third-party source, Reviewed August 31, 2026
Hands-on review used for assembly, support feel, recline, chair weight and value observations.
Duramont, Manufacturer specification, Reviewed August 31, 2026
Official product page used for mesh back, foam seat, lumbar pad, headrest, casters and load rating.
TechGearLab, Third-party source, Reviewed August 31, 2026
Comparative hands-on test used for comfort duration, tall-user fit, lumbar range and adjustment limitations.
FlexiSpot, Manufacturer specification, Reviewed August 31, 2026
Official product page used for headrest, recline, lumbar system, coat hanger and model identity.
PC Gamer, Third-party source, Reviewed August 31, 2026
Multi-tester hands-on review used for foam durability, fit differences, arm controls and recline locks.
Staples, Manufacturer specification, Reviewed August 31, 2026
Official retailer and brand-owner page used for Hyken identity, nine adjustments, seat dimensions, rating and warranty.
Petersen Physical Therapy, Third-party source, Reviewed August 31, 2026
Clinician-authored hands-on review used for petite fit, mesh support, headrest position and adjustment limits.
Ticova, Manufacturer specification, Reviewed August 31, 2026
Official product page used for 3D arms, adjustable headrest and lumbar, foam seat and recline range.
BTOD.com, Third-party source, Reviewed August 31, 2026
Comparative test coverage used to cross-check Ticova comfort, lumbar pressure, adjustments and budget value.
