187 is the first thing in America! Shock absorbing dual foam, super strong nylon for functionality and durability. The S size is suitable for elementary school and junior high school students, small men and women. Height 150-165 Weight 40-55 M size is middle school and up, standard size men Height 5 ft 5.0 inches - 5 ft 10.1 inches (165 - 178 cm), Weight 12.7 - 24.8 inches (55 - 68 cm), Size L is high school and above Height 178-190 Weight 68-90 Note) Above is just a guide. Knee pads are not meant to be barefooted or they may stretch out after a few uses. The final decision will be left to you. ※Click on the image to see a clear enlarged image. The actual color and texture may differ slightly depending on your monitor and environment.