#4 Medium-Worsted, Afghan, Aran Knit Gauge Range* in Stockinette Stitch to 4 inches 16-20 sts Recommended Needle in Metric Size Range 4.5-5.5 mm Recommended Needle U.S. Size Range 7 to 9 Crochet Gauge* Range in Single Crochet to 4 inch 11-14 sts Recommended Hook in Metric Size Range 5.5-6.5 mm Recommended Hook U.S. Size Range I-9 to K-10.5 * These are guidelines only