The size isn't specified, but it can accommodate up to 48cm at the top and 43cm at the bottom, so I believe it's a size L. ☺️ ✨️Anonymous shipping & Free shipping✨️ Please check the actual product photos for the condition. ☺️☘️ #may's product list★ [Multi-purpose] Thick and durable EVA air cushion, suitable for various sports such as volleyball, skating, dance, baseball, and basketball. Knee pads, knee supports, set of 2, knee pads, easy to wear, 2.5cm thick, dance protector knee, elastic protective pads, knee protection, knee shin protector, breathable knee pads, breathable, for work, baseball, knee brace, both knee set (L/Black) 11-28/62