3 piece wrist elbow knee protector set. The size is suitable for children up to elementary school students. Size Guideline: Listing only (around the palm of the arrow) S: 7.4 - 7.9 inches (18.7 - 20 cm), M: 7.9 - 8.9 inches (20 - 22.5 cm), L: 8.9 - 9.8 inches (22.5 - 25 cm).