I would also recommend buying one wash, and going one size down from your usual size (assuming you do not have particularly stout or muscular thighs). I am a 32 waist in j.crew, Epaulet, and other standard trousers, which typically measure out to 32.5" or 33" in the waist. I went with PBJ xx-005 one wash in size 31, and you can see the fit here
in post #572 of this thread. The waist was snug at first but stretched out to measure about 32.5-33". The thighs were sausage casings at first, and took a little longer to loosen up, but fit well now. I've washed them a few times, never put them in the dryer, and though they do tighten up after a wash they've never shrunk past their original measurements and stretch out again pretty quickly.
I love the denim on these but if I did it again I'd get a tapered model, probably the 013, because the straight fit really looks like a bootcut fit and I eventually had the 005's tapered (after those photos were taken).