A Silicone Sport watch strap for apple watches in 38/40/41mm or 42/44/45/49mm case sizes. This strap is compatible with all generations of apple watch and comes in two sizes to suit the smaller and larger apple watch cases: 

42/44/45/49mm S/M size fits for 5.5"-7.7" (140mm-190mm) wrist

42/44/45/49mm M/L size fits for 6.3"-8.3" (160mm-210mm) wrist

38/40/41mm S/M size fits for 5.1"-7.1" (130mm-180mm) wrist

38/40/41mm M/L size fits for 5.9"-7.9" (150mm-200mm) wrist

This strap is the perfect replacement for the standard apple watch strap and features a pin and tuck closure. These sport bands are ideal for running, exercising, swimming, walking, playing, yoga or sleeping, etc.