This bi-cone set rolls 5 sizes of bi-cone polymer clay beads with crisp lines and points. The sizes are 7/8", 5/8" ½", 3/8" and ¼".It is fun and easy to add swirled patterns to a bi-cone bead. Measuring clay for this set is best accomplished using a 6 inch ruler with raised increments. A ruler is offered on this page. Instructions for accurately measuring clay and rolling beads with this set are included.