This trio of latex balls (2.7"diameter) are perfect for my power-chewer miniature wire-haired doxie! I've tried various balls from pet places over the past few years, and my (now) 5-year-old mini-doxie loves these! He is a bit of a retriever, wanting interaction from me, which I also enjoy, and they are not too light to be easily destroyed. Because of that, they move better and have a better "chase" factor. They fit the bill for a happy small to medium-sized play toy, as I cannot continue to buy $10 'tough dog' toys that will be demolished in 15 minutes! I think the interaction is the key. Also the squeak on these is not overtly loud. I will buy more, as I think they are good quality and very safe for a 3.5" x 2.5" sized snout (measured alligator style). Thanks! I was at my wits end to find anything like it!