Apple Watch is divided into two size categories, 38-42mm & 43-49mm.
The straps fit all generations of Apple Watch in each size category.
-
Apple Watch: 38mm, 40mm, 41mm and 42mm share the same size of adapter and can use the same strap. -
Apple Watch: 43mm and up to 49mm share the same size of adapter and can use the same strap.


