Compatible Models: The Sport silicone watch bands are compatible for Apple Watch 38mm 40mm 41mm 42mm 44mm 45mm 49mm, Ultra,Series 8, Series 7, Series 6, Series 5, Series 4, Series 3, Series 2, Series 1, SE | No More Skin Irritation: The watch band use soft and smooth silicone which is durable and lightweight. Comfortable touch feeling free your wrists when you with the silicone sport apple watch band | Free Size: 38mm/40mm/41mm Size fits 5.1"-7.1" (130mm-180mm) wrist; 42mm/44mm/45mm/49MM Size fits 5.9" - 7.9" (150mm-200mm) wrist. Please check the size on the back of your watch to choose the right size before purchase | Easy Installation: The sport band for apple iWatch comes with watch lugs on both ends, which locks onto apple iWatch interface precisely and securely | Friendly customer service: You can contact us, if there is any question with our product. We will do our best to let you have an happy shopping experience