Also how does apc fit? I am a 29-30 waist in slim straight in levis, 30s run a little bit larger on me though. I want a slim version or even a skinny but not the very skinny; so what waist size should I get? I am sorry b/c I dont know much or anything about apc, just hear they run large though. Just size down once or none at all on the Petite Standards if you want a baggier fit. They run a bit large, especially since they stretch with wear. By 1 size do you mean from a 29 to a 28 or from a 29 to a 27?
Say, if you are a 29, get a 28. It'll be a bit skinny, but it should stretch after a month of wear. The biggest mistake I see people do with these jeans is that they get their natural waist size, and it ends up being too baggy after it begins to stretch. OGcake's post is a good example of sizing one down. It's skinny but with some room to breath.
If you are still iffy on the fit, go to a store to try them on, or, if you are buying them new, most online stores will allow you to return the jeans for a different size as long as you don't cut any of the tags off.