Prism by Pieceful Quilter Thread Kit 12wt 12 Large (356 yard) Spools Aurifil 12 wt. Prism collection from Aurifil Selection by Pieceful Quilter, Michele Scott Thread Kit includes 12 Large 12 weight spools, 356 yards (225 meters) each 100% Cotton; premium quilt shop quality thread Packaged in a convenient case by the manufacturer