We wish you could have a nice shopping experience. We hope this information would help you to make a better purchase since we knew some new owners of the Apple Watch may not familiar with the size of watches. Actually, Apple Watch 1/2/3/4/5/6/7/8/9 & SE & Ultra, the bands that fit the 42mm version would also fit the 44mm 45mm 49mm case, cause they were the same design in the notch part, the bands that fit the 38mm version would also fit the 40mm 41mm case, so no matter what series watch you got, all you need to do are: Check the size under your watch. Measure the length of the wrist. Select the right one for you: For iWatch 41mm/40mm/38mm (wrist 4.5" - 8.54") or For iWatch 49mm/45mm/44mm/42mm (wrist 8" - 11").