Apple
Apple Watch Ultra 49mm Band Size & Fitting
The Apple Watch Ultra takes 49mm bands. Apple says 44mm, 45mm and 46mm bands also fit, but recommends them only for casual, everyday use.
Lug fitting49mm band
| Strap fitting | 49mm band |
|---|---|
| Case size | 49 mm |
| Lug-to-lug | — |
| Thickness | 14.4 mm |
Which model do you have?
Similar-looking models can take different bands. Your model and case size are on the box, your receipt or the watch's settings.
| Model | Case | Band |
|---|---|---|
| Apple Watch 40mm (SE, Series 4–6) | 40mm | Small: 38/40/41mm |
| Apple Watch 41mm (Series 7–9) | 41mm | Small: 38/40/41mm |
| Apple Watch 42mm (Series 10/11) | 42mm | Small: 38/40/41/42mm |
| Apple Watch 44mm (SE, Series 4–6) | 44mm | Large: 42/44/45/46/49mm |
| Apple Watch 45mm (Series 7–9) | 45mm | Large: 42/44/45/46/49mm |
| Apple Watch 46mm (Series 10/11) | 46mm | Large: 44/45/46/49mm |
| Apple Watch Ultra | 49mm | 49mm, or 44/45/46mm |
Strap styles that fit
- Brand / OEM strapMade for this exact model.
- Adapter + standard strapBuy a model-specific adapter first.
- NATO / pass-throughNo standard lugs to pass through.
- 2-piece leatherNeeds an adapter to fit.
- Rubber / FKMOEM or adapter only.
- Metal braceletModel-specific bracelet only.
▲ 49mm bands; Apple says 44, 45 and 46mm bands also fit for casual, everyday use.
Fit & sizing notes for the Apple Watch Ultra 49mm
- What to buy: straps made for the Apple Watch Ultra 49mm, or an adapter kit for this exact model. A normal-width strap won't attach on its own. Our integrated & smartwatch strap guide explains the options.
- Adapters stick out past the case, so the watch wears longer; check the adapter's output width before buying straps for it.
- Every Apple model: see our Apple Watch band size guide for which bands fit each one.
- Strap thickness: at 14.4mm thick it's a chunky case: thicker padded leather, rubber/FKM or a heavier NATO balance it visually; very thin straps can look undersized.
Sources & corrections
Fitting checked against: Apple: Change your Apple Watch band. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
Get the right strap
Links open Amazon — we may earn a commission at no cost to you.
Apple Watch Ultra 49mm — band questions
What strap size does the Apple Watch Ultra 49mm take?
The Apple Watch Ultra takes 49mm bands. Apple says 44mm, 45mm and 46mm bands also fit, but recommends them only for casual, everyday use.
Can I put a normal NATO or leather strap on it?
Not directly. A standard strap won't attach on its own. Where a model-specific adapter exists, fit that first and then a normal strap of the adapter's width.
Where can I buy straps that fit the Apple Watch Ultra 49mm?
Search for straps and adapters made specifically for the Apple Watch Ultra 49mm; generic sizes won't clip in without one.