Weeks Dye Works Perle is a colorfast, hand-dyed, and over-dyed cotton, with #5 being the thickest and #12 being the finest of the three weights. Each of these fibers is perfect for blackwork, cross stitch, needlepoint, embroidery, and wool applique.
Perle #12 is great for embroidering details. It is also fine enough to go through beads for embellishing, and strong enough to keep the beads in place. Perle #12 is sold in 45 yard spools.