Easy 3D balls come in small,medium and large. These balls are made of  lightweight, porous material that absorb Powertex to create  a fabulous  sculpting and texturing medium for  canvases and abstract art .  Used together, in various sizes, 3 D balls create a  pleasing mix of random patterns that enhance the dimension of  your mixed medium projects. 3D balls and 3D sand  work best with Easy  3D  Flex... Available in s/m/l