THESE DEVICES ARE High Quality 100% Steel They will fit 99% of people! The head ball is: neck area: 103.86cms Neck Diameter: 11.5cms Neck Circumference: 36.12cms Ball area: 572.55cms Ball Diameter: 27cms Ball Circumference: 84.82cms The hand balls are: The maximal inside diameter is 7.0 cm. Ball diameter is 12.0 cm. THANKS FOR LOOKING:)
