From a horse toy to a training aid, Stacys Activity Ball is a versatile tool for a wide range of riders. A DVD hosted by natural horsemanship expert Stacy Westfall shows you the many uses for this ball. It can be used as an aid in training horses, a tool to help you work on balance and seat position and a horse toy that offers hours of enjoyment. The smaller sizing of this ball makes it perfect for smaller people or horses. While horses will find the smaller size more of a challenge, people will find the smaller size easier to control and handle. Includes a pump for easy inflation. The balls circumference should be approximately 68" when fully inflated with a height of 20". Please inflate fully to help prevent horse from biting ball. Supervision is recommended at all times. Purple.