6 sizes! for quality and durability, this professional-grade stability ball fits the bill for any fitness or athletic facility, PVC, Available in 6 sizes, Order by user"s height (see chart on pg, 31), Tape measure included, Deflates slowly if punctured, Color: Jet Black, Diameter: 75 cm(29, 5""), Height: 6"2"" - 6"7"", SKU: PWSS690