Bubble Soccer Ball Specification: - Ball Diameter: 5 FT / 4FT - Zorb Ball Height: 50.4 / 41.3 inch - Inner Diameter: 23.6 / 19.7 inch - Strap Length: 37.4i/ 35.4 inch - Weight: 20.5/16.5 lbs Size Guide -- Diameter 4 ft Suitable for children (ages 8+) with normal size Height: 3\'9-4\'9 Weight: 60-100 lbs(normal size) -- Diameter 5 ft Suitable for te..