Designed for people between 5-feet, four inches to six-feet tall, Valeo's 65-centimeter exercise ball is a great addition to your everyday workout routine to improve strength and posture. With many ways to incorporate it into your workout, the body ball is especially effective for sit-ups and other low-impact exercises. It includes a wall chart illustrating step-by-step exercise program and a high volume air pump. Just take it out of box, inflate it, and you'll be ready to exercise at home.