Our interchangeable Bands For Samsung Galaxy Watch 4 40mm/ Watch 4 44mm / Watch4 Classic 42mm, one general size, suitable for 5.5-8.7 inch / 22 cm Wrist, and precise alternative holes allow you adjust the suitable size, for both boys and girls. They are made of durable and flexible silicone rubber, breathable, comfortable to wear, eco-friendly and safe for human skin, stainless steel buckle, and more durable & tough! Massive perforation enhances breathability and ventilation with added comfort, also easy for installation, no tools required so easy to put on or take off. There are different colors to choose. Go ahead to personalize your smartwatch to fit your mood and outfit in daily life.