Our bands have been tested to fit all sizes of Apple watches and all series, the larger face sizes will have a tiny gap on the sides noticeable only if you're looking for it!
Fits sizes: 38mm, 40mm, 41mm, 42mm, 44mm, 45mm

S/M Band fits 6"- 7½" wrist

M/L Band fits 6¾"- 8 3/8" wrist