The common sizing with the earlier number of series before that was 40mm and 44mm, and that continue to relates to the Apple Watch SE. The 41mm Apple Watch will operate with bands with the 38mm and 40mm versions, and the 45mm Apple Watch works with bands manufactured for that https://brooksjbrgw.blog-eye.com/26910264/the-ultimate-guide-to-heyday-watch-band-for-apple-watch