?Adjustment Size?: Move the adjustment ring to fit the desired position and fix it on the appropriate size. 38/40/41mm fits 130-210mm (4.9”- 8.2”)wrist, 42/44/45/49mm fits 130-220mm(5.8”-8.5”) wrist. ?For All Scenes and Best Gift? i watch bands combine with wave and adjustable loop design for apple watch bands women men. Breathable, lightweight, flexible, stylish to meet your daily wear matching in all scenes. A ideal gift for Birthday, Party, Thanksgiving, Christmas, New year, Valentine's Day, Fathers Day, Mothers Day, etc..