Awhile back, on another site, I posted a request for a tobacco pouch pattern. A very talented fellow leathercrafter, Opel Mok, answered my request and posted a tobacco pouch pattern which I used. I changed the design on mine but followed his pattern directions and it came out very nice. I have attached what he sent me. It may be what you are looking for. He has a website that you might be interested in checking out too - http://asailorsleather.blogspot.com - it has a place where you can leave a message of thanks if you decide to use his pattern.
Terirae
Tobacco Pouch Pattern - inside.pdf
Tobacco Pouch Pattern - outside.pdf