I LOVE these so much!! I am 5'6 and about 135 lbs. I ordered a size 9 and they fit perfectly.

Here's the part where I'll over share details because buying close online can be annoying and sending things back can be even more so.
I personally prefer short but to the point detailed reviews, so to save you some reading.

If you have a hard time finding pants because you have wide hips and no butt... and maybe even so flat that your butt might be more like an extension of your lower back. Or maybe you have no hips and all booty. The pants will still fit like like a charm. They are true to size. These are American Junior sizes and I'm probably way too old to be buying Junior sizes... Oops. Well they look good and feel good. I wish they had more colors to choose from. Wait... are you still reading this? Just put them in your cart already.