TWO SIZE BALL OPTIONS:【Large Ball】 — Diameter is 3.5inch/9cm, rope length 19.7inch/50cm, weight: 0.26lb,Suitable for medium dogs and Large;【Trumpet Ball】— Diameter is 2.75inch/7cm, String Length 19.7inch/50cm, Weight: 0.16lb, suitable for small and medium sized dogs.< /p> PRODUCT MATERIAL:Virtually indestructible foam material and strong nylon rope, soft and safe for dogs of all ages INTERACTIVE AND FUN: This dog ball with rope is safe , non-toxic, durable to chew, elastic, soft, you can throw the balls and command your dogs to retrieve them, strengthening the relationship between you and your beloved dog ,Knotted ropes are also ideal for shooting games rope and recovery. WATER TOY: This fitness ring toy floats on water, not only is it great on land, but can also be played in the swimming pool, the r river or lake.