I wear a 29" to 30" in pre-washed. Based on comments here, I ordered a 31" waist. WAY too big; i could pull the jeans over 2" away from my hip. Exchanged for a 30" waist, will see how those do. I remember buying 501 rigid jeans back in the 70's, those shrunk about 1" in the waist so that is what I am going with now. I'll follow up with results when I get the exchange. Build, stitching and over-all quality looked real good, just like they used to be :)

UPDATE: Got the exchange in 30X36, much better. Washed in inside out in HOT, again outside out in HOT, dried till bone dry. Fit great, maybe little tight but one afternoon wearing them and they stretched out again enough to be super comfortable. They shrank about 1" in the waist and about 2" in the length (glad I ordered 36" length). Great jeans; will order a second pair.