The pattern uses an F hook with worsted weight, size 4 medium yarn. The crochet patterns uses single crochet and front post half double crochet stitches. You can find my tutorial on working a front post double crochet here: Front Post Double Crochet Tutorial. A front post half double crochet will be worked in the same way, the only difference would be that you would work a half double crochet in place of a double crochet stitch. For beginners who are not yet adventurous enough to try the post stitches consider replacing them with single crochet stitches instead.