Are Apple Watch series 4 size 40mm bands compatible with the smaller versions?
Will the apple watch series 4 size 40mm band compatible with the smaller versions?
[Re-Titled by Moderator]
Bands for 38mm and 40mm cases are compatible with each other and bands for 42mm and 44mm cases are compatible with each other: https://support.apple.com/en-us/HT204818