They 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. Fits wrists up to 8 inches

Can fit 42mm & 44mm with gaps on the side. 

*To clean, wipe with rubbing alcohol and/or scrub lightly with baking soda. Over time, this band will appear more dull in color and/or show wear due to wear, dirt, etc.