Apple Watch Sizing

You can match most bands with any Apple Watch Series 3 or later case of the same size.

38mm, 40mm, 41mm, and 42mm bands are compatible with 38mm, 40mm, 41mm, 42mm case sizes. 44mm, 45mm, 46mm, and 49mm bands are compatible with 44mm, 45mm, 46mm, and 49mm case sizes.

Apple Watch Ultra and pair best with the 49mm case size. The bands are also compatible with 44mm, 45mm and 46mm cases.