There’s good news for new Apple Watch Ultra owners. The bands are backwards compatible from previous versions, which means any band that fits the 44mm or 45mm Apple Watch Series 8, 7,6 and older models will also fit the 49mm Apple Watch Ultra and vice versa.
However, bands from the smaller sizes of the Apple Watch such as 38mm, 40mm and 41mm are not compatible.
Here’s a compatibility chart below to help you understand which Apple Watch bands are compatible with the 49mm Apple Watch Ultra
| Band Size | Apple Watch Ultra Compatible |
| 38mm (Series 1,2,3) |  |
| 40mm (SE, Series 4-6) | |
| 41mm (Series 6-8) | |
| 42mm (Series 1-3) |  |
| 44mm (SE, Series 4-6) | |
| 45mm (Series 7,8) | |
FAQ
Do Apple Watch Ultra bands fit the Apple Watch 8?
Yes, the new Alpine loop, Trail loop and Ocean bands fit on any Apple Watch Series 8 cases that are 44mm, 45mm.
Does the Apple Watch Ultra fit older bands from Series 7, 6, and older?
Yes! The Apple Watch Ultra fits 42mm, 44mm and 45mm bands from Apple Watch Series 1 through Series 8.
How come the bands fit if the 49mm Apple Watch Ultra is much larger?
This is because throughout the years, the Apple Watch case only increased by 0.7mm on the smaller Apple Watch and 1.6mm on the larger model. The band mount spacing remained the same throughout the models.
