The geneva set includes 3 different kegel balls with gradual increased weights, developed to strengthen the pelvic floor muscles.Effective kegel exercises improve vaginal health, resulting in increased libido and enhanced sexual satisfaction. Each kegel ball is equipped with a silicone string to easily take out the ball after use. Start by wearing the ball with the lightest weight, 46 grams, learn how to squeeze and hold the ball inside the vagina for 2 seconds in sessions of 10 or 20. Exercise frequently and slowly increase the duration of the training to the first 5 and later 10 seconds. Change to a heavier ball, 77 grams and work your way up to the heaviest ball, 107 grams. Ball 1length 137 mmdiameter 36 mmweight 46 grams Ball 2length 160 mmdiameter 28 mmweight 107 grams Ball 3length 172 mmdiameter 32 mmweight 77 grams