Aunt Lydia's-Special Value Crochet Thread. This economy crochet cotton is ideal for tablecloths and bedspreads as well as craft projects! Made of 100% mercerized cotton: size 10. 1000 yards. Recommended Crochet Hook: B-1, 6, 7, 8 (1.6-2.25mm). Recommended Knitting Needles: US0-1/2-2.25mm. Crochet Gauge: 32-42 (4in/10cm). Knitting Gauge: 33-40s = 4in/10cm. Care: Machine washable. Available in a variety of colors. Each sold separately. Imported.