Gibson Rainbow Gymnastics Hand Grips, MADE IN USA Made for strength training and gymnastics. Minimize rips, tears, blisters and calluses on your hands Palm grip. Fingers holes to be worn at base of fingers. To size, measure from base of middle finger to base of palm. Medium - 3 to 3.5", Large - 3.5 to 4", X-Large - 4" and up Slightly undersized finger holes for customized fit. Recommended that you use sandpaper to increase hole size Made in the USA, with top quality US tanned leather with all imperfections removed. 30-day manufacturer's warranty