Adjustment Size Move the adjustment ring to fit the desired position and fix it on the appropriate size. 42mm , 44mm, 45mm, 49mm fits 130-220mm(5.88.5) wrist.

Compatible Models Meyaar sport watch band are compatible for apple watch 49mm 45mm 44mm 42mm for apple watch Ultra band apple watch series 8 band apple watch series 7 band apple watch se band apple watch series 654321 all version.(Watch Not Included)

Compatible Models Also for FireBoltt Visionary BSW046 FireBoltt Ring BSW005 FireBoltt Ring Pro BSW029 FireBoltt Call BSW0146. (Not for any other watch models) (Watch Not Included)