Pearl (Perle) Cotton Thread Set - 40 Different Color Spools - 75 yds each Full set of 40 spools heirloom quality Size 8 pearl cotton thread 100% mercerized cotton, heavy weight, lustrous thread 75yds/10 gramsper spool Conveniently wound on spools Also called perle cotton. Used for quilting, embroidery, cross stitch, crochet, friendship bracelets and more.