For your preshrunk dimensions (31x32), the 501 STF are expected to shrink 1" in the waist and 3" in length. The ideal size for you would be 32x36. I have not ventured to try a pair of 501 STF myself because my local stores don't carry anything above 34" in length. According to Levi's size scales, however, 501 STF in a 32" waist is produced in all lengths up to 38" but I haven't taken the time to see if these obtuse sizes (by Levi's standards) are available online.
7/21/07 at 3:58pm