Mix and match 4 ben wa balls and 2 holders to create your ideal kegel workout for better control and orgasms. The weighted balls shift and shake with your moves for stimulating thrills. Size varies from 4.5 in. to 6.5 in. long 1 in. to 1.5 in. wide. Weights range from 1.1 oz to 2.4 oz. Made from silicone and firm ABS plastic with a metallic finish.