The Stay Put Exercise Ball comes in three sizes; 55cm, 65 cm, and 75 cm.  These balls are unique in that once placed on the floor for use, they will NOT roll away.  You can do every exercise with this ball you can do with any other yoga ball, without the liability of getting hurt when you go to sit down and your yoga ball has rolled away.  

It is the SAFE way to exercise when using Exercise Balls.  It comes with a foot pump for easy inflation.

Legs should be bent at 90 degrees when seated on the inflated, proper sized Stay Put Exercise Ball.

Proper Exercise Ball Sizing:

Exercise Ball Diameter: 55cm / Person's Height: 5’1” - 5’8”
Exercise Ball Diameter: 65cm / Person's Height: 5’9” - 6’2”
Exercise Ball Diameter: 75cm / Person's Height: 6’3” - 6’7”