Spool of thread is 600 meters or 656 yards

100% long staple Egyptian cotton, 3 ply, mercerized for strength, colorfast and shrinkfast, tightly twisted and balanced, and virtually lint free. Available in 40, 50, and 60 weights - the higher the number, the finer the thread. 50 weight is ideal for general construction and applique. 60 weight is perfect for quilt piecing to achieve and exact 1/4" seam allowance. 40 weight is designed for longarm quilting and decorative stitching - when you want the stitches to show.