I've never purchased a better fitting dress at Gap - you need to buy her NOW! Fabric is super soft, and very flattering on the body. For reference I'm 5'10, 215lb with curves and was able to order a large, regular length. Large fit perfect, it was long enough to cover the goods, and the material was just stretchy enough to snatch my waist without bagging out. Definitely order a size down since this garment is a stretch fabrication, and a long if you're past 5'10. Love the dusty, vintage purple/blue look of it - completely unique wash in my closet. The zipper function is also very helpful for the girls - can't wait to wear her on the town!