I have to agree that the fit is unfortunate. i am using a size 2 in retailer and most dresses. i knew to size up based on reviews here. i tried the size 4 and i could barely button the top. the waist fit fine and the underarms was fitted nicely to the body. i sized up to a size 6 and the dress was oversized in the top, with gaping armholes. too bad because the color is beautiful and the style is adorable.