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 1.6 in. with 1.6 long durable silicone between each. The Baller is extremely pliable and has a ringed handle for a secure grip and easy manipulation. 16 in. long. Ball width 1.6 in.