Aunt Lydias 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. Size 7/1.5mm crochet hook is recommended. Care: machine wash warm, gentle cycle. Dry flat. Do not bleach, do not dry clean. OK to iron. Imported.