I'm 5'8" tall and 138 lbs. Size 8 or 10 in jeans, medium in shirts. Ordered a medium at first and it was a little tight for my taste. Ordered a large and it's a good fit. Skirt could be a little longer for me personally but still ok. The skirt has a very flattering flare. Seems to draw your eyes to the best and away from the rest ha ha