Shepher Training IQ Treat Toy for Small/Medium Dog Puppy Non-toxic Durable Rubber Teether Chew Squeaker Feeder Toy Nipple Size specifications: S: 3.7" Inch Length; M: 5.7" Inch Length Soft, pliable textured vinyl surface made for easy gripping Insert treats, which fall out during playtime,M with bell inside, S without bell. Have interest to help the dog teeth, cleaning teeth and exercise Extremely durable dishwasher safe material by Rubber