10 BCW GOLF SQUARE HOLDERS DEAL The BCW Golf Ball Square is made of high impact, crystal clear polystyrene and features a 2 piece design. Use this golf ball holder to protect, store and display your collectible golf balls. ---Holds a regulation sized golf ball ---2 piece design ---Each Box contains 6 Holders. Exterior Dimensions: 1 15/16 x 1 15/16 x 1 15/16 Interior Dimensions: 1 23/32 x 1 23/32 x 1 23/32.