12cm total length. Handle 8.5cm.
This is a good sized ball even if you are new to using kegel balls. There are also double ball and or large ball variants.
Has a silicone handle.
Add some lubricant to the kegel ball.
Open your legs, relax your vagina, push the ball slowly into your vagina.
When comfortable you can do some exercise, like walking, swimming or doing house work etc. The internal metal ball will collide with the inner surface while you are moving to cause a pleasing vibration.
Clean it before and after use with soap and warm water, then let it dry naturally in the air