Milliard Weighted Massage Hula Hoop, For Intense Abdominal Workouts and Quick Fat Burn - For Experienced Hoopers, Diameter 40in Acupressure balls on inside of the hoop improve your metabolism, toning and strengthening Textured balls provide a therapeutic massage effect A great combination of fitness and fun for all ages! Portable and great for home, gym, and travel Diameter 100.5 cm 40 in.