BATH BOMB MOLDS for crafting your own Bath Bombs or Bath Fizzies with these sphere molds, round molds, metal molds, ball molds, Lush bath bombs DIY, Cake Molds Three pairs (6 halves) of aluminum sphere, bath bomb molds for DIY bath bombs These molds are easy to clean and reusable Diameters: large bath bomb mold 2.56 inches (6.5cm), medium bath bomb mold 2.15 inches (5.5cm), and small bath bomb mold 1.77 inches (4.5cm) The large mold can make 5oz bath bombs, but weight depends on how firmly the bomb mix is pressed into the mold Push the two halves together to create a round shaped bath bomb, these molds will not lock together