This is the pattern that uses the crocodile stitch on the looms, and was done with the CinDwood Looms. It was written for a 12,18, 24, and 30 pegs looms in 1/2 gauge, other gauges will affect the size some in other brands.
I did you almost a skein a bootie in the Lions Brand Heartland yarn with the strands doubled. Typically when making child to adult booties which is the 24 and 30 peg looms you will use a skein a bootie as the crocodile stitch eats a lot of yarn.
This pattern has a video tutorial for help, and a PDF pattern download with links under the picture.