Norbert's Athletic Products 15" Mini Gymnastics Octagonal Tumbler This item is 15" tall and only suitable for toddlers, preschoolers and children under 40" tall. If you are unsure about size, ask your gym coach. Tumbler's flat planes enhance stability& minimize rolling 15" x 15" x 24" and Covered with extremely durable 18 oz. vinyl and filled with 70 ILD prime polyurethane; Nylon webbing handles are securely fastened to each end