You will need to double up on your strands of yarn if you choose to use worsted yarn but only 1 if you use bulky yarn. The tutorial shows for a baby but the blog gives a guide to larger sizes. I would suggest a crochet edge.
I include the 36 and 41 peg knifty knitter loom as well as the 44, 59, 60 peg 1/2 gauge cindwood looms.