Aunt Lydia's Crochet Cotton. This high luster mercerized cotton crochet thread is perfect for crochet projects both large and small. This thread is available in a wide range of fashion solids neutral basics and alluring multi-colors that are ideal for home decorating and fashion projects. Article 154 is a size 10 bedspread weight 3ply 100% mercerized cotton thread. White and Ecru: 400yd/365.75m Solids: 350yd/320m and Shaded Colors: 300yd/274.3. Size 7/1.5mm crochet hook is recommended. Care: machine wash (. 104F/40C) dry flat do not bleach do not dry clean OK to iron. Imported.