Compatible ModelThe sport silicone strap compatible with Apple Watch Series 8 7 6, 5, 4, 3, 2, 1,Apple Watch Ultra SE(2/1). Size 38mm/40mm/41mm-S, perfectly fit for wrists 5.1"-7.1" (130-180mm);Size 42mm/44mm/45mm-S, fit for wrists 5.5"-7.5"(140-190mm); Size 38mm/40mm/41mm-L, fit for wrists 5.9"-7.9" (150mm-200mm); Size 42mm/44mm/45mm-L, fit for wrists 6.3"-8.3"(160mm-210mm) Premium SiliconeThis strap compatible with apple watch strap is made of durable and soft silicone material, which can prevent skin from irritation and bring you a comfortable wearing experience Buckle DesignThe replacement watch bands with stainless steel buckle, easy to assemble and resize, holds your band securely in place Secure ConnectorThe stap compatible with Apple Watch comes with watch lugs on both ends, which locks onto the watch interface precisely and securely. Easy to install and remove with one button Multiple OccasionVarious popular colors choices for women, men, boys and girls, personalize your watch to fit your mood and outfit in daily life