Preciosa Maxima Crystal chatons in a metal setting measuring 5mm, or SS20. Sew through holes on the back for wiring. All who want to bead jewelry in the designer style of Miriam Haskell need these in their beading baskets as this is a key element for her style. You simply wire through the back. Also can be glued into an assemblage or mosaic design. Czech Crystal chatons in an acid tin finish setting. One hundred (100) pieces per package. Measurement & Specs