The friezes thus far have been 4x4" up to 12x12" in size. Yesterday I finished a piece that was 14" wide and 6" high. I put eye screws in the back- one screw on each side and strung wire for hanging it but after it had been on the wall for a few hours the polymer clay "relaxed" with the warmth of the room and the piece bowed in the middle! I put the frieze back in the oven to get the warp out and I'll rethink the location of the screws. There may be a restriction to size and shape for pure polymer clay pieces that are in a hanging format. As I hope to gradually increase the size of the friezes I may need to construct some projects on a board for strength.