This is something very simple that can be made in a couple of hours for those who are some what skilled or about 2 days for someone just starting. I included the basic pattern the rest will have to be done by hand or any style you want, but i will show you how to create the ripped flesh pattern that i have used in other instructable. Please enjoy and ask any question that you may have.
Print out the basic pattern I included then start to draw basic pattern. Look at picture to for example. Wet the leather then put the paper ( card stock) or tracing paper. then using a tracer tool Imprint the pattern on the leather before it drys.