Features Sizing (Measure wrist circumference): Small: 5"-6" / Medium: 6"-7" / Large: 7"-8", Custom-Molding, Gel-to-Shell technology. Shield begins soft but transforms to hard and protective in minutes., Molds to fit either wrist. Impact is dispersed, not absorbed., Provides either inside or outside of the wrist protection., Designed for batters, fielders, catchers, umpires in baseball and other sports.