Size is L. This is a single L size item! With anti-slip function! These are high-quality knee sleeves made of neoprene! I used them for a while when I had discomfort in my right knee, and they reduced the load of daily life without restricting my movement too much. My knee circumference is 33cm. Please refer to the slide for a guide. I found that the M size provided a moderate compression and was easy to move in, it was just right for me. For your reference! The L size was a little too big for me. - Type: Knee support - Size: L size (single item) - Thickness: 5/7mm - Material: Neoprene - Features: Non-slip technology, additional compression and support - Recommended height: 172cm - Recommended weight: 63kg Thank you for viewing!