I'm 5'3 and normally wear a petite size 27 in Joe's jeans (snugger fit) or size 28 (looser fit).  I ordered the size 28 in these thinking they would be a snug fit since the skinny style runs smaller.  Unfortunately, they were way too tight.  The thighs and waist felt like a size 26!  I could barely button them up.  I loved the wash and the length is perfect--they fit nicely into boots.  However, too small is too small, so I sent them back.  I have a curvy figure and would have needed to order these jeans in a size 29.  If you have slimmer thighs & hips, you can probably get away with just one size up from your regular size.