Sulky-Cotton Petites 12wt Slimline Dream Assortment. The perfect collection for your embroidery projects and more! With a wide range of colors, you can create multiple designs with ease. This package contains sixty-six 50yd spools of sulky cotton thread in solid colors and fourteen 50yd spools of sulky cotton thread in blendable colors in one 14x13-1/2x2 inch clear case. Imported.