Compatibility The silicone sport straps are compatible with Apple Watch SE, SE3, Series 11, Series 10, Series 9, Series 8, Series 7, Series 6, Series 5, Series 4, Series 3, Series 2, Series 1, and Sport Edition ALL VERSIONS. Watch is not included. Replacement strap only for both women and men. Upgrade Colour Clasp The band fits Apple Watch sizes 38mm/40mm/41mm/42mm (Series 11/10) and 42mm (Series 3/2/1) / 44mm / 45mm / 46mm / 49mm with a pinandtuck closure. We provide colormatched pin clasps to coordinate with the sport band color, giving your watch a more fashionable look. Suitable as a gift for women and men on occasions such as Birthday, Father's Day, Mother's Day, Valentine's Day, Christmas, and Year. Skinfriendly Silicone Made from soft silicone that is gentle on the skin, reducing irritation. Soft and smooth to the touch for comfortable allday wear. Waterproof and easy to dry, breathable for better comfort during activity. Size Advice 38mm/40mm/41mm/42mm (Series 11/10) S/M fits wrist 5.1' to 7.1' (130mm180mm) 38mm/40mm/41mm/42mm (Series 11/10) M/L fits wrist 5.9' to 7.9' (150mm200mm) 42mm (Series 3/2/1)/44mm/45mm/46mm S/M fits wrist 5.5' to 7.5' (140mm190mm) 42mm (Series 3/2/1)/44mm/45mm/46mm M/L fits wrist 6.3' to 8.3' (160mm210mm) 49mm fits wrist 5.9' to 8.3' (150mm210mm) Please choose the correct watch model and size before . Use scenarios Fitness and sports: secure silicone strap stays in place during workouts, swimming, running, and gym sessions. Everyday wear: lightweight, comfortable all day, easy to clean, and swap colors to match outfits. Travel and outdoor activities: durable, quickdrying, and lowmaintenance option for various environments.