Massage balls relax sore muscles. Feel great on feet and back. Easy to catch and throw. Blue yellow and red. Set available in 3 sizes. The j/fit Mini Massage Balls are more than just colorful toys- they can be used for massage therapy and for improving dexterity. Ideal for the feet and back the little balls are easy to hold catch and throw with their rubbery texture. They come in blue yellow and red and measure 8 9 and 10 centimeters in diameter. About j/fitJ/fit is committed to providing high-quality fitness equipment at reasonable prices. The selection has expanded from 10 products to over 300 in order to meet the needs of the marathoner the beginner and everyone in between. The fitness world is constantly changing and j/fit aims to be on the forefront of the latest technology at each juncture.