The right size depends on your wrist measurements and whether you prioritize screen readability or comfort.
Wrist Size Guidelines
- Under 6.5 inches: 42mm typically fits better
- 6.5 to 7 inches: Either works; personal preference decides
- Over 7 inches: 46mm usually looks more proportional
Apple's official ranges: 42mm fits 130-200mm wrists, 46mm fits 140-245mm wrists.
Why Choose the 46mm
The larger display offers real benefits:
- Easier to read text and complications
- More comfortable for app interaction
- Better for users with vision issues
- Slightly larger battery
The 46mm has approximately 23% more display area than the 42mm.
Why Choose the 42mm
Comfort is the main advantage:
- Feels "barely there" during sleep
- About 6 grams lighter
- Catches on sleeves less often
- Looks more proportional on smaller wrists
- Costs $30 less ($399 vs $429 for GPS)
Important Sizing Note
Apple changed their sizing system. The 42mm is now the "small" size. Old bands from a 42mm Series 3 won't fit the new 42mm Series 11. Current 42mm uses the same bands as older 38mm, 40mm, and 41mm models.
How to Decide
Visit an Apple Store to try both sizes. If that's not possible, Apple offers printable paper cutouts on their website to visualize each size on your wrist.
When choosing between sizes, consider what matters more: screen readability or lightweight comfort.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from ShopSavvy's price data.
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