The double ends give you plenty of size options to work with too. Packaged in a convenience storage kit, the set contains crochet hooks, 5 3/8" in length, with ends in size 2.0, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5 and 6.0mm along with 2 blunt tip tapestry needles.