The Fitness Mad swiss ball is suitable for those who are 5'10'' (177.8cm) & over & has a diameter of 75cm (29.5''). It is great for weight training, Fit Ball workouts, Yoga, Pilates or Physiotherapy & has been SGS Labs tested as burst resistant at 750kgs (1653.5 lbs) load. It is rated as suitable for 500kgs (1102.3 lbs) load & comes in a violet colour.