Elastic motorcycle kidney belt back support in Medium size has a total length of 40 inches. Body overlap needs 3 inches. Medium size kidney belt fits belly waistline 32 – 37 inches circumference at the belly waistline. Please…. Please…..Please DON'T use your pant size while purchasing. Please…. Please…. Please….make a measure before purchasing. To check if this size fits you > use a flexible measuring tape and find the circumference around your body at your belly button. AVESTON compression kidney belt alleviates lower back pain, provides fitting support after kidney surgery, and helps get on and off your car and when you bend a bit forward to grab things Wear men's kidney belts with lumbar support for work, weightlifting, for jogging, for running, for bicycling, for motorcycling, for sport, for a workout, for mole, for moving, for bouncing, for riding horses, dirty bike, and you will be able to extended working period without any back pain.