The bracelet is compatible with a 40 mm case. The 41 mm bracelets fit 38 mm and 40 mm cases, so a 40 mm case is compatible with this bracelet.

The band does not fit directly on the Apple Watch Series 7 (45mm) as it is designed for 46mm models. However, 45mm bands are often compatible with 42mm, 44mm, 45mm, 46mm and 49mm models, depending on the specific band design. It is advisable to check compatibility directly with Apple as there may be exceptions.