DescriptionExercising with jade egg will have a lot of fun and a pleasant sensation, it has also been shown to improve vaginal tightness dramatically when compared with normal pelvic floor exercises. No matter how old you are or how many children you have had, you'll see a change in your tightness in a matter of days.Features-Material: Obsidian.-Size S: About 3.00X2.00X2.00cm/ 1.77X1.18X1.18in.-Size M: About 4.00X2.50X2.50cm/ 1.57X0.98X0.98in.-Size L: About 4.50X3.00X3.00cm/ 1.77X1.18X1.18in.- The jade egg is smooth and exquisite, so you can use them with confidence. - Using the jade eggs for exercise helps become moist, strengthening your pelvic floor muscles and improves vagina health. - Jade eggs for lady to strengthen pelvic floor muscles and for countering stress adult urinary Incontinence. - Other hand, there are plenty of sensitive spots in our vaginal canal and the jade eggs can wake them gently up. - You can use them during meditation, while sitting down watching TV or while walking around doing every day activities.