Apple Watch Strap Sizes
Lug width and strap fitting for every Apple model in our index. Tap a watch for the full guide.
the Apple Watch 45mm and the Apple Watch 41mm and the Apple Watch Ultra 49mm and the Apple Watch 46mm and the Apple Watch 42mm (Series 10/11) and the Apple Watch 44mm and the Apple Watch 40mm use an integrated or proprietary fitting, so normal straps need an adapter (how that works). For a model-by-model explanation, see our Apple Watch band size guide.
Apple lug width chart
| Model | Reference | Strap size | Case | Lug-to-lug |
|---|---|---|---|---|
| Apple Watch 45mm | Series 9 | 45mm band | 45mm | — |
| Apple Watch 41mm | Series 9 | 41mm band | 41mm | — |
| Apple Watch Ultra 49mm | Ultra 2 | 49mm band | 49mm | — |
| Apple Watch 46mm | Series 10 / 11 | 46mm band | 46mm | — |
| Apple Watch 42mm (Series 10/11) | Series 10 / 11 | 42mm band | 42mm | — |
| Apple Watch 44mm | SE / Series 4–6 | 44mm band | 44mm | — |
| Apple Watch 40mm | SE / Series 4–6 | 40mm band | 40mm | — |
Strap size = lug width. Not sure which model you have? Measure it or see the strap size chart for every brand.