sizeNo. 0 is suitable for 3.8-4.2CM length fingers, length 5CM, inner diameter 1.7CMNo. 1 is suitable for 4.2-4.8CM length fingers, length 5CM, inner diameter 1.8CMNo. 2 is suitable for fingers of 4.8-5.3CM length, 5.6CM long, 2CM inner diameterNo. 3 is suitable for 5.3-5.5CM length fingers, length 5.7CM, inner diameter 2.1CMNo. 4 is suitable for 5.5-6.0CM length fingers, 5.8CM long, 2.1CM inner diameterNo. 5 is suitable for fingers with length of 6.0-6.5CM, length 6CM, inner diameter 2.2CMWeight: No. 0 5g, No. 1 6g, No. 2 7g, No. 3 7.3g, No. 4 8g, No. 5 9gColor: Skin ToneMaterial: PE VelcroBREATHABLE MATERIALS FOR ALL-DAY COMFORT: The trigger finger rest resists the skin and won't cause sweat to stick to it. Give your fingers a good recovery environment. Comfortable to wear for a long time.Effective Finger Pain Relief: This finger support bracket has built-in aluminum support, which can help effectively relieve popping, bending, swelling, soreness. More, trigger finger splints support the fingers to reduce stiffness and prevent finger joints from locking or jamming. The most important is conservative treatment to prevent surgery and/or to relieve pain and promote healing after surgery.Fits all your fingers: The special durable aluminum material can be shaped according to the patient's injured finger, and the curved plate is easy to adjust. So it fits the finger width perfectly, so the universal trigger finger splint can be worn on any finger or thumb, including middle, index, ring or little finger, perfect for men, women and children.Versatile and Portable: Trigger finger splints can be used for a variety of finger pains, such as stenosing tenosynovitis, stiffness or mallet fingers. Also, this splint is a great addition to any home emergency first aid kit or sports first aid kit such as basketball, baseball or volleyball. Included for typing, cooking and driving. And it's very small and easy to carry..