Thank you for viewing! This is a supporter designed under the supervision of a physical therapist to reduce the burden on the lower leg. It's roughly a women's size S. As a bonus, I'm also including an ankle supporter (for one foot). The knee supporter is almost new. The purchase price was 4180 yen. The bonus ankle supporter was used for 1-2 weeks. It has been washed. The purchase price was about 1500 yen. The box opening is torn. It's bulky for packaging, so I won't include the box, but I will include it if you need it (I'll flatten it). Please let me know when you purchase. - Brand: ZAMST - Model Name: JK-1 - Purpose: Reduce the burden on the lower leg - Features: Design supervised by a PT (physical therapist) - Size: Free size - Accessories: Instruction manual Thank you.