Cuir De Lyon PERFIT Black Rubber Replacement Watch Band/Strap Loop Band and Strap Keeper Loop - Secures the tail end of the watch band or strap Fits Casio, Timex, Garmin, Invicta, and Luminox bands, plus other rubber watch bands and leather straps Non-marking resin rubber Size denoted the inside width of keeper opening, Use a ruler to measure the width of the band at the tail end(the part that goes through the keeper) and you will have the right size Pro Tip: Use a small flat screwdriver or knife blade to remove the buckle pin and buckle to install the keeper loop