Main trade-off
Garmin Forerunner 570 42 mm
The 1.2-inch screen gives less physical room. The supplied band ends at 178 mm.
Head-to-head
Forerunner 570 42 vs 47 mm: Band fit before screen size
The short answer
Choose 42 mm for a 115–134 mm wrist with the supplied band. Choose 47 mm for more display room if its larger body and band fit. The larger screen has about 36% more area using the rounded 1.4 and 1.2-inch diagonals, while the watch adds 8 g. Both list up to eight hours of multiband recording with music, so size alone does not extend that routine.
Before you choose
The reasoning and the trade-offs
A 130 mm wrist and a 190 mm wrist lead to opposite answers
At 130 mm circumference, the small watch’s supplied band is within its stated range and the large watch’s is not. At 190 mm, the large supplied band fits the documented range while the small one is too short. This makes measuring the wrist more useful than choosing a size by gender, height or age. A replacement band can alter the boundary, but its compatibility and cost become part of the purchase. Case fit remains a separate check, especially if the watch will be worn to sleep or under a close-fitting sleeve.
What this is based on
Two illustrative measurements compared with supplied-band intervals. No demographic proxy or comfort guarantee.
Main trade-off
Garmin Forerunner 570 47 mm
The supplied band starts at 135 mm and the watch weighs 8 g more. A larger screen is not proof of better legibility.
Garmin Forerunner 570 42 mm
- Choose it for
- Use the supplied 115–178 mm band on a smaller wrist and carry 42 g including the band.
- Keep the same documented eight-hour multiband-with-music ceiling in the smaller case.
- Main trade-off
- The 1.2-inch screen gives less physical room. The supplied band ends at 178 mm.
Garmin Forerunner 570 47 mm
- Choose it for
- Use a 1.4-inch display for more physical data space, after trying the actual layout.
- Fit a wrist above 178 mm with the supplied 135–205 mm band.
- Main trade-off
- The supplied band starts at 135 mm and the watch weighs 8 g more. A larger screen is not proof of better legibility.
About this comparison
Compare both Forerunner 570 sizes by actual band range, display area and music battery. The larger case does not extend every activity mode.
These sizes share the same training and calling family, so creating separate pages for cosmetic colors would add little. Case size, supplied band range, screen size and battery modes create a genuine sizing decision.
Winner by situation
Start with what you need it to do
130 mm wrist, original supplied band
The large band starts above that measurement.
- Garmin Forerunner 570 42 mm
- Better fit
- Garmin Forerunner 570 47 mm
- Not suitable
190 mm wrist, original supplied band
The small band ends below that measurement.
- Garmin Forerunner 570 42 mm
- Not suitable
- Garmin Forerunner 570 47 mm
- Better fit
More physical room for several data fields
The larger display offers more area, with layout and fit still to check.
- Garmin Forerunner 570 42 mm
- Good
- Garmin Forerunner 570 47 mm
- Better fit
Buying larger only for multiband music battery
Both publish the same eight-hour ceiling in that mode.
- Garmin Forerunner 570 42 mm
- Good
- Garmin Forerunner 570 47 mm
- Good
What matters in practice
The differences that matter
A 130 mm wrist and a 190 mm wrist lead to opposite answers
At 130 mm circumference, the small watch’s supplied band is within its stated range and the large watch’s is not. At 190 mm, the large supplied band fits the documented range while the small one is too short. This makes measuring the wrist more useful than choosing a size by gender, height or age. A replacement band can alter the boundary, but its compatibility and cost become part of the purchase. Case fit remains a separate check, especially if the watch will be worn to sleep or under a close-fitting sleeve.
How we reached this conclusion
Two illustrative measurements compared with supplied-band intervals. No demographic proxy or comfort guarantee.
More display area is useful only if it improves the page you actually use
Using the rounded screen diagonals, 1.4 squared divided by 1.2 squared gives about 36% more circular area on the larger watch. A runner who wants pace, distance and a timer visible together may value that space. The watch’s data layout and font settings still decide how it is used. Someone who only checks one large field may gain much less while carrying an extra 8 g. Try the intended page in motion and at rest before making a readability claim from the screen dimensions alone.
How we reached this conclusion
Multi-field glance use crossed with geometric display area and supplied weight. The ratio uses rounded diagonals and does not predict font size or eyesight outcomes.
The larger watch does not buy a longer soundtrack for this activity mode
Both sizes list up to eight hours with multiband GPS and onboard music. The larger size gains one listed hour when multiband runs without music, from 13 to 14, but that does not carry over to the combined mode. For someone whose longest event uses a playlist throughout, paying for the larger case solely for battery headroom does not solve the stated constraint. Both need reserve beyond the expected finish and testing with the intended settings. Moving audio to the phone changes the setup and should be treated as a separate plan.
How we reached this conclusion
Long-event music habit crossed with exact combined-mode tables. No general assumption that every larger watch lasts longer.
Choice A
Garmin, 010-02970-00
Garmin Forerunner 570 42 mm
Use the supplied 115–178 mm band on a smaller wrist and carry 42 g including the band.
- Best matched use
- Use the supplied 115–178 mm band on a smaller wrist and carry 42 g including the band.
Checked facts
- Included band: 115–178 mm wrist range.
- Display: 1.2-inch AMOLED.
- Body and weight: 42.4 mm case, 42 g with band.
- Multiband battery: Up to 13 hours, or 8 with music.
Choice B
Garmin, 010-02971-01
Garmin Forerunner 570 47 mm
Use a 1.4-inch display for more physical data space, after trying the actual layout.
- Best matched use
- Use a 1.4-inch display for more physical data space, after trying the actual layout.
Checked facts
- Included band: 135–205 mm wrist range.
- Display: 1.4-inch AMOLED.
- Body and weight: 47 mm case, 50 g with band.
- Multiband battery: Up to 14 hours, or 8 with music.
Meaningful differences
What changes the fit
| What changes | Garmin Forerunner 570 42 mm | Garmin Forerunner 570 47 mm | Why it matters |
|---|---|---|---|
| Included band | 115–178 mm wrist range. | 135–205 mm wrist range. | Below 135 mm favors the small supplied band. Above 178 mm favors the large one. |
| Display | 1.2-inch AMOLED. | 1.4-inch AMOLED. | About 36% more circular area from rounded diagonals, not a guarantee of larger text. |
| Body and weight | 42.4 mm case, 42 g with band. | 47 mm case, 50 g with band. | Case overhang, sleeve fit and weight need trying together. |
| Multiband battery | Up to 13 hours, or 8 with music. | Up to 14 hours, or 8 with music. | The larger version does not add published music-mode time here. |
What you give up
Every choice has a cost
If you choose Garmin Forerunner 570 42 mm
- Black 010-02970-00. A different band changes the fit range and package.
If you choose Garmin Forerunner 570 47 mm
- Whitestone/Turquoise 010-02971-01. Calls on both sizes need a connected phone.
Recommendation switch
The decision flips if...
Your measured wrist is 115–134 mm
Choose Garmin Forerunner 570 42 mm. The small supplied band is the relevant starting point.
The larger band fits and your data layout benefits from more space
Choose Garmin Forerunner 570 47 mm. The larger screen has a clear job to do.
What matters in practice
Before you choose
A larger display is tempting, but a band that does not fit can make the whole watch the wrong purchase.
What this comparison cannot tell you
- No measured comfort, readability or runtime test.
- Replacement bands can change fit and weight.
What the facts say
What the comparison shows
Useful conclusions from the current sports watches comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Garmin Forerunner 570 42 mm |
|
| |
| Garmin Forerunner 570 47 mm |
|
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Garmin Forerunner 570 42 mm
Use the supplied 115–178 mm band on a smaller wrist and carry 42 g including the band.
Keep the same documented eight-hour multiband-with-music ceiling in the smaller case.
See price & reviews on AmazonGarmin Forerunner 570 47 mm
Use a 1.4-inch display for more physical data space, after trying the actual layout.
Fit a wrist above 178 mm with the supplied 135–205 mm band.
See price & reviews on AmazonLinks open in a new tab.