Upgrade you apple watch to fit any setting with multiple leather styles. With numerous options as far as strap and buckles, you will never have to worry about not matching the outfit you are trying to achieve. These straps are compatible to 38mm 40mm 41mm 42mm 44mm 45mm, and Apple Watch Series 1-7, & SE. 38/40/41mm wrist strap fits for 140-180mm wrist. 42/44/45mm wristband fits for 148-200mm wrist.