The BallQube Softball Holder is made of high impact, crystal clear polystyrene,features a 2 piece design with built-in stand and you can add 98% effective UV coating. - Holds all regulation sized softballs - Crystal Clear - Stackable - UV Protection - Perfect for autographed softballs Dimensions - Exterior 4 1/8 x 4 1/8 x 4 1/8 - Interior 3 13/16 x 3 13/16 3 13/16