Wrist Guard Supporter Developed in collaboration with Professor Sato, Emeritus Professor of Saga University Blue Gray L size (unisex) I purchased this new on Amazon, but I'm selling it because it was too tight when I tried it on. It has been opened once, so I'm offering it to someone who understands that... (Quoted from the following site) If using for extended periods, repeat taking it off and putting it on as needed. Do not wear if you are outside the applicable size range. Do not use immediately after sprains or fractures, or other injuries. Do not use if there are any abnormalities such as wounds, swelling, or rashes on the area to be worn. If a rash, irritation, congestion, or pain occurs during or after use, discontinue use immediately. Do not use while sleeping. Do not snag with nails or sharp objects, as this may cause "fraying". Sizes (circumference of the widest part of the palm): M size; 16-22cm L size: 18-24cm LL size: 20-26cm ・Regarding size: If you feel it's a little tight or small when you wear it, stretching the fabric or having someone with larger hands, such as a man, wear it may loosen the fabric a bit. If it's still uncomfortable to wear, consider sizing up or temporarily stopping use. The feeling of "becoming comfortable" is the most appropriate state.