Reporting back--with more personal details than I typically reveal! Rachylou, mine are a size 28. I typically wear a size 4 (with a rare 6 or 2 thrown in the mix) at Banana, Gap, Loft and JCrew. For JCrew denim, my pairs are 27, 28 and 29. For Gap denim, 4s and maybe a 6. So, how do the Paige fit as a 28? They are close. Not major muffin top close, but close. I wanted them to have a very punk feel, so they are legging close on me. The SA tried to push me toward a smaller size with the usual argument about stretching as you wear them, but I wouldn't budge. I think most SAs are holding onto an outdated idea of super tight jeans anymore. I tried sizing up, but they were weirdly baggy and awkward around the knees then, while still tight on my calves (which are quite muscular). I thought they were better all-over skinny than fitted-loose-tight. Hopefully that helps!
ETA: DH just came home with coffee (love that man!) while I was wearing the jeans and he quite adamantly endorsed my jean purchase.