The Athletic Works Flat Fitness Ball is a versatile exercise equipment designed for home use. With a diameter of 55cm, this fitness ball is suitable for individuals up to 5'3 in height (21.65 inches). It can be used to target various muscle groups such as legs, arms, abdominals, and full body, making it an essential tool for gym and training activities. The brand Athletic Works ensures quality and durability in this fitness ball, providing users with a reliable option for their fitness routine.