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 #8 is much finer and its color, texture, and shape become the focal point of the design, not the stitches themselves. Perle #8 is sold in 10 yard skeins.