I just traced around his hand/arm and added about a quarter of an inch or so all the way around and cut through 2 layers of T shirt. The eyes, scale things, and tongue I hand sewed on. If you need a visual:
It would have been a bit easier if I had sewed the features on then sewed the side seams, but all in all they turned out pretty cool... Considering I finished them in two hours (guys I take forever to hand sew anything)
Inspired by these from Etsy