Each ball 4.5cm over all length 10cm exc. cord.
Waterproof design, suitable for bathing use.
Smooth skin-like surface.
High grade medical silicone material.
How to use:
Add some lubricant to the kegel ball.
Open your legs, relax your vagina, push the ball slowly into your vagina.
After that, you can do some exercise, like walking, swimming, doing house work, the metal ball will collide with the inner surface while you are moving.
Clean it before and after use with soap and warm water, then let it dry naturally in the air.