size M: The bottom length is 20CM, the top length is 8CM, and the total length of the longest belt is 37CM, the width is 20.5CM, and the edge thickness is 0.4CM L: The bottom length is 20CM, the top length is .58CM, plus the total length of the longest belt is 38CM, the width is 24.5CM, and the edge thickness is 0.4CM Weight: M72.3g, L88.1g Colour: Black Material: OK cloth, aluminum alloy, Velcro Finger Splint: The Original Finger Splint provides superior protection and support for 4th and 5th finger fractures. Great for broken fingers, broken fingers, sprained joints, post operative care and finger pain relief. Built-in aluminum core: Finger splint aluminum core bends easily to provide the best fit. Slim Design: The slim design and easy on and off design allow you to wear the stand under normal clothes for a long time. Innovative Features to Maximize Results: The fabric's structure evenly distributes pressure and impact, providing gentle compression for extra support and massaging, alleviating inflammation, swelling and pain. Adjustable straps on wrist and fingers allow for controlled compression, custom fit and maximum stability. Adaptable aluminum struts ensure a better fit and greater stability. Seamless knit prevents irritation. INSTANT RELIEF AND COMFORT: The Finger Stabilizing Knit Wristband provides immediate pain relief and supports your fingers and wrist in a stable and comfortable position for daily activities while you recover.