Tennis players and dog owners, this 6-pack of rockible tennis balls is exactly what you need for training and play! Each ball measures 6.4cm (about 2.52 inches) in diameter, made from quality rubber with that classic tennis felt covering. What impressed me is how durable they are - they maintain their shape and bounce even after serious hitting sessions or rough dog play. The rebound is consistent and lively, perfect for improving your reaction speed and control during practice. The soft inner core makes them comfortable to grip and hit, while the felt covering provides that authentic tennis ball feel. We use them for everything - tennis practice, outdoor training exercises, and yes, our dog absolutely loves chasing them too! The multicolored set means you can easily distinguish between balls during group practices or games. They've held up surprisingly well on different surfaces - concrete, clay courts, even grass - without wearing down quickly. For the price, getting six quality balls is a steal compared to buying name brands. Whether you're a beginner working on your strokes or an experienced player looking for practice balls, these deliver great performance. They also make fantastic gifts for tennis enthusiasts - practical, affordable, and something they'll actually use. Seriously, these balls have become our go-to for both sports training and keeping the dog entertained in the backyard!