【Size】Free Size Holder part: Approximately 40cm wide Approximately 17cm long Pad part: Approximately 33cm wide, 9cm long I purchased and compared several arm holders because my neck hurt with a triangular bandage. I didn't need to use this until it arrived, so I only wore it for a few minutes on two trips to the post office. Like a sports supporter, it's lightweight and the fabric is sturdy, so it felt like it conformed to my body without bunching up. The belt buckle is easy to use, and the shoulder pads are soft. The belt comes behind the shoulder, so my neck doesn't hurt even when my arm is immobilized. A smartphone holder would also be convenient for injuries that prevent you from carrying a bag.