size:Large Ring--- The outer diameter is 11.8 inch/30 cm, and the thickness is 2 inch/5 cm,Weight: 0.47 lb Suitable for medium and large dogs Tear resistant elastic EVA material:Our large dog ring toy is soft and stretchy, can be used to train dogs reaction throw, catch, fetch, pull, tug of war etc, which are harmless to teeth and gums, and can also be used as dog molar toys to help dogs develop.Good chewing habits. Water Toy: This fitness ring toys is water floating, it is not only great on the land, but also can be played in the swimming pool, river or lake. Build Relationship: This Pet Agility Set Can Help To Nurture The Relationship Between Pet Owners And Pets While Teaching Them New Tricks, Benefits Both You And Your Pets. Humanized Design: This product is designed with a ring and has no sharp edges, don't worry that your fingers will be scratched; and it's very easy to clean, just wipe it with water or a rag. Colour Name:Yellow Size Name:Large Ring(Medium & Large Dog Inner Diameter: 8.3inches/21cm Outer Diameter: 11.8inches/30cm Materia: Non-toxic EVA(Ethylene-Vinyl Acetate Copolymer) Package includes: 1* Fitness Ring This large dog ring toy is environmental and non-toxic, it is gentle on a dogs mouth and dog owners hand. It is super strong and durable enough to play all kinds of interactive games. Great to develop dogs muscle group and reduce dogs anxiety and aggressiveness. Warming Tips: 1.This large dog training ring toy cannot be chewed but can be bitten, so dont leave it unattended. 2. Please make sure this big size suitable for your dogs. 3. Please allow slight dimension difference due to manual measurement.