Even though the mechanism for all watch bands is identical, you must follow the exact measures a little bit in different ways for various watch bands. The strap is on the market from the Apple Watch Series 6/SE sizes of 40mm and 44mm, together with the 38mm and 42mm sizes https://thekiwisocial.com/story2441360/gold-apple-watch-band-case-can-be-fun-for-anyone