Luna Beads Mini is the smaller version of the Luna Beads. The bullets are only 29 mm in diameter, allowing every woman to choose her best fitting pelvic floor trainer. Recommended for women under 30 and women who have never had a baby. The benefits of using these balls: More intense and frequent orgasms, reduced risk of incontinence, and other pelvic floor disorders and preparing the body for an easier pregnancy. Easy to insert and discreet to wear. The balls contain a weight that causes a vibration during movement that causes the muscles to contract during daily activities. Each set contains two bullets of 28 grams and two of 37 grams. These balls can be used in any desired combination. Diameter of the balls is 29 mm.