Just try catching these balls! The protrusions on these "odd" shaped balls make them bounce in unpredictable directions. Helps build reaction skills and tracking abilities. Approximately 2-5/8" diameter. Set of 6 includes one in each Spectrum color.; ; Don't pay a lot and still bring your "A" Game.; That's the Spectrum Difference.; ; Spectrum products deliver superior quality at a price that's easy on your wallet.; ; Tough enough for regular use in the gym or on the playground, great for training, perfect for introducing kids to sports and What a Selection! ; ; Get Spectrum and Get Playing!