Luna Beads Mini are great for pelvic floor exercises. They are just like the classic set of Luna Beads but 7 mm smaller. The Luna Beads Mini set comes with two pairs of balls with different weights inside, and a silicone brace to hold them. Mix and match the balls within the brace or use them one at a time. There are up to 5 different combinations of weights possible. Balls are ABS plastic with coated strings. It comes with a satin bag for storage. Beads are 29 mm in size and weigh 28 grams (blue) and 37 grams (pink)