Compatible ModelsThe sport replacement silicone watch bands are compatible for Apple Watch 38mm 40mm 41mm 42mm 44mm 45mm , Series 7, Series 6, Series 5, Series 4, Series 3, Series 2, Series 1. NOTICE: S/M means size Small, M/L means size Large! Please choose the correct watch model and size for yourself.Size Available38mm/40mm S/M Size: Suitable for 5.1"-7.1" (130mm-180mm) wrist;38mm/40mm M/L Size: Suitable for 5.9"-7.9" (150mm-200mm) wrist;42mm/44mm S/M Size: Suitable for 5.5"-7.5" (140mm-190mm) wrist;42mm/44mm M/L Size: Suitable for 6.3"-8.3" (160mm-210mm) wrist.Premium MaterialThe sport bands are made of durable and soft silicone material, which can prevent skin from irritation and bring you a comfortable wearing experience.Easy InstallationThe sport band for apple iWatch comes with watch lugs on both ends, which locks onto apple iWatch interface precisely and securely.Multi ChoicesThere are different popular colors apple sport band to personalize your apple iwatch and fit your mood, outfit in daily life, dress up your apple iWatch and highlight your unique taste.