A sex toy consisting of hollow balls (often attached), which are inserted into the vagina. The balls often have inner moving parts, which can create pleasing vibrations for the wearer. The accessory is also known by various other names including Burmese balls and Venus balls.

Ben Wa balls can strengthen the pelvic floor muscles over time, allowing for stronger orgasms and a tighter feel. Like many vaginal toys, Ben Wa balls are often used with added lubrication.