The Sounce braided band comes in 42mm, 44mm, 45mm, and 49mm sizes, making it compatible with a range of Apple Watch models including the 42mm, 44mm, 45mm, and 49mm sizes in iWatch Series 9, 8, 7, SE, 6, 5, 4, 3, 2, 1, Ultra, and Ultra2. It's important to verify your Apple Watch model to select the right size before making a purchase.The Sounce loop nylon band is tailored to fit various Apple Watch models, including the Ultra and Ultra 2 in 49mm, Apple Watch 9/8/7 in 45mm, Apple Watch SE 2nd Gen/SE/6/5/4 in 44mm, and Apple Watch 3/2/1 in 42mm.