I have bought from this place http://www.softpouch2.com/index.html
The sizes are as described, so always buy bigger, because the flat size won't be big enough when you add in the diameter of the bottle stopper. Check out the "specials" for close outs, sometimes you can get a real good deal. They may not have the same size or style the next time you order if you buy the close outs, but I just order something close to what I did before.