Compatibility:Compatible for Apple watch series 3,series 6,series 5,series 4,series 2,series 1,series SE. 38mm/40mm-S/M, 38mm/40mm-M/L sizes are made for 38mm and 40mm apple iwatch, 42mm/44mm-S/M, 42mm/44mm-M/L sizes are made for 42mm and 44mm apple iwatch, suitable for women and men.Skin-friendly: Sunnywoo bands for apple watch made of premium silicone, prevents skin from irritation and rash, comfortable to wear everyday. With adjustable stainless steel pin-and-tuck buckle , can be prevent rusting, quickly adjustment and skin-friendly.Available Size:Those silicone sport strap for Apple watch has two size:38mm/40mm S/M-Suitable for 5.1 "-7.1" (130mm-180mm) wrist; 38mm/40mm M /L-Suitable for 150mm to 200mm (5.9 "-7.9") wrist; 42mm/44mm S/M: Suitable for 140 mm - 190 mm (5.5 "-7.5") wrist; 42mm/44mm M/L: Suitable for 160mm to 210mm (6.3 "-8.3") wrist.please measure your wrist or ask our customer service before your order this band.Various Colors: Our band for iwatch women and men have more than 10 colors for you to choose: cactus,burgundy,black,deep navy,pink sand,white,lavender grey,yellow,gray......Different Colors could give your iWatch a totally different new outlook,match your outfits both for daily wear and special affairs.