Ass Ballz Medium are a backdoor favorite. The heavy Ballz are 100% medical-grade. high-end silicone with no filler. The seamless. matte surface has a soft touch silicone finish. Each of the 4 insertion balls are 2.4 in. with 2.4 long durable silicone between each. The Baller is extremely pliable and has a ringed handle for a secure grip and easy manipulation. 21 in. long. Ball width 2.4 in.