Instructions? 1. Please measure your palm circumference before purchasing and choose the right size to ensure proper fit and performance. 2. Don’t make the belt too tight or too loose. If it is too tight, it will affect blood running, which is not conducive to wound recovery, or if it is too loose, it can’t be fixed. Product Name?CMC Thumb Brace Model Number? VP0907 Material: TPU plastic, Stainless Steel, Nylon. Color?Grey with Blue SIZE? Small (S)? Medium (M)? Large (L) S?Palm circumference 6?- 7 1/2?/ 16-19 cm M?Palm circumference 7 1/2?- 9?/ 19-23 cm L?Palm circumference 9?- 10?/ 23-26 cm Note: Please use under the guidance of doctors and professional persons. If there is any dyke break on the trauma place, it should be used with caution, or to avoid direct contact with it. Washing: Please securely fix the Velcro before washing, so as to prevent the Velcro strap from damaging or gluing other clothes. Use neutral detergent to wash it in water at 30°C. Rinse it thoroughly with clean water after washing. Do not use fabric softeners. Do not bleach, machine wash or dry clean. Do not wring dry after washing, but you can squeeze it by hand or use a dry towel to suck in excess water, then place it in a dry place. Do not iron, dry or expose directly to the sun.