Size is M. This is not a set sale! Features non-slip function! These are high-quality knee sleeves made of neoprene material! I used these 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 the size guide. I found the M size provided a moderate compression and was easy to move in, it was just right for me. For reference! The L size was a little too big for me. - Type: Knee support - Size: M 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.