In general, I've found that older pairs (made before 2005 or so) run about 1 size smaller than other brands like 7FAM and CoH. Newer pairs (made in 2005 or 2006), however, seem to run about the same as other brands (like Diesel got the hint that girl's don't like sizing UP). But certain cuts and washes do not adhere to those rules of thumb. For example, you need to size down 1 or 2 for the "60B" wash.
Good advice to try on a few pairs to get a feel for things.