UPF 50 Women's Extra-Long Sun Sleeves One Size Black One size fits all. Sold as a pair. Available in three basic colors to work with any sun protective outfit; black, nude and white. Measures 21 inches knuckle to underarm. Perfect for your active day in the sun; walking, running or riding your bike. Upf 50 certified, lightweight, breathable, pre-shrunk fabric. 90% cotton 10% spandex, 11oz.