I am 5'8" wearing a MEDIUM in RED. I have ordered a handful of colors in this style and Red was by far my favorite because of the color pop and it is not see through! I originally ordered a XLarge and the waist was too loose so now I have a medium. Because of the dresses chest cut, it naturally gives off a larger chest look. I do not have a robust chest but do have more girth and the buttons in medium were tight. If you have a larger chest or wear a padded bra order a size up or hand stitch the chest seam to keep the button elastic from coming undone. These dresses really are marvelous!! Happy Spring! Even though there is still snow in the ground in North Dakota! :D