Apple Watch band size chart: which bands fit your case
Apple Watch bands come in two sizes. The small size fits 38, 40, 41 and 42mm cases, and the large size fits 44, 45, 46 and 49mm cases. The mm on a band is the case it's made for, not the band's width, so a band labelled 42mm fits a 40mm watch.
Will this band fit that watch?
Pick both watches to see the answer.
Band size for each Apple Watch
| Model | Case | Band size | Solo Loop | Bands |
|---|---|---|---|---|
| Apple Watch Ultra 4 49mm | 49mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 12 46mm | 46mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 12 42mm | 42mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 12 ceramic 47mmnot named in Apple’s guide | 47mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 12 ceramic 43mmnot named in Apple’s guide | 43mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Ultra 3 49mm | 49mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 11 46mm | 46mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 11 42mm | 42mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch SE 3 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch SE 3 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 10 46mm | 46mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 10 42mm | 42mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Ultra 2 49mm | 49mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 9 45mm | 45mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 9 41mm | 41mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Ultra 49mm | 49mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 8 45mm | 45mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 8 41mm | 41mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch SE (2022) 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch SE (2022) 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 7 45mm | 45mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 7 41mm | 41mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 6 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 6 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch SE (2020) 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch SE (2020) 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 5 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 5 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 4 44mm | 44mm | Large (fits 44–49mm cases) | Sizes 0–12 | Amazon · Apple |
| Apple Watch Series 4 40mm | 40mm | Small (fits 38–42mm cases) | Sizes 0–9 | Amazon · Apple |
| Apple Watch Series 3 38mm | 38mm | Small (fits 38–42mm cases) | Not compatible | Amazon · Apple |
From Apple's band support page, checked November 2026. "Small" and "large" are our words for Apple's two groups. Apple's page doesn't name the Series 12 ceramic's 43mm and 47mm cases, so we place them with the 42mm and 46mm lines they're sold in. Its rule starts at Series 3, and we leave out Series 3 42mm because the page doesn't say whether its 42mm group includes that older case. Amazon links are searches, so check that the listing names your watch.
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When the size group isn't enough
Solo Loop and Braided Solo Loop are sold in numbered sizes and need a Series 4, SE or Ultra or later. Milanese Loops from before Apple's 2018 redesign have a closure that won't slide through the lug. Ocean Band, Alpine Loop and Trail Loop are 49mm bands designed for the Ultra's rugged use.
Putting a regular band on an Apple Watch Ultra
44, 45 and 46mm bands fit an Ultra, but Apple says they're for casual, everyday use only. If you move a Solo Loop to an Ultra, you might need a smaller size because of the larger case, so try it on before buying.
Shop bands by size
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