Length & Wrist Size guide: Extra Small: 115 mm/4.5 inches in length, fit for wrist size from 130mm to 140mm / 5.12" - 5.51"(based on a 40mm watch face; actual fit may vary depending on your watch size) Small: 125 mm/4.9 inches in length, fit for wrist size from 140mm to 165mm / 5.51" - 6.5"(based on a 40mm watch case; actual fit may vary depending on your watch size) Medium: 140 mm/5.5 inches in length, fit for wrist size from 165mm to 180mm / 6.5" - 7.09"(based on a 40mm watch case; actual fit may vary depending on your watch size) Large: 160 mm/6.3 inches in length, fit for wrist size from 185mm to 200mm / 7.28" - 7.87"(based on a 40mm watch case; actual fit may vary depending on your watch size) Lug Width: 20mm, fits with watches that use 20mm quick release straps Material: Zinc Alloy Clasp type: Elastic Elastic watch band for different wrist sizes Easy to install, no tools needed This colorful watch band with a bungee rope to adjust combines fun geometry with a brilliant drip process to make your watch truly stand out. No ordinary band here - take your wrist game to the next level.