EXSLVBW4 Black White 2-pk Active Sport Sleeve XL Includes 1 White Sleeve and 1 Black Sleeve Light weight and moisture wicking material Holds most cellphones and mp3 players For X-Large arms BICEP CIRCUMFERENCE IN INCHES: S: 7-10 in, M: 9-13 in, L: 11-16 in, XL: 15-18 in