I wear a 32" waist and have at least 8 pair of various slacks - off the rack - in that size.  I realize there is some difference in sizing - some of my 32"s are snug, some are loose, so I expect there will be some variation.  However, I ordered these in 32" waist and when I put them on, they were at least a 36", maybe 38"; I looked like the "after" picture of weight watchers when someone puts on their "fat pants" and there is enough room for another person.
This is not a normal variation, this is massively off. My guess is they have a quality control problem in their labeling and tagging process and are simply tagging their slacks with the wrong size.  I see from other reviews this is not an unusual problem.  I am returning these things and will not bother re-ordering.