History states that oriental women were the first to discover Ben Wa Balls. They inserted these balls into their vaginas and then rocked back and forth to achieve orgasm. It is said that BenWa Balls work best in strengthening the bladder and tightening the walls of the vagina. This can be achieved by inserting and holding them in place for about 15 minutes a day. It is also reported that inserting them in the front of the vagina and wearing them daily helps to achieve G-Spot orgasm. Includes two Ben-Wa balls each about 3/4 inch in diameter (slightly larger than our other balls), comes in a nice clear box.