Super cute sundress or swimsuit cover up, this has a royal blue pattern with a cream background and shoulder ties! It is fairly sheer and lightweight, so it would make a great swimsuit cover up. Just a cute little lightweight sundress! This measures 13 inches across the bust and 25 inches long. These run fairly small, so I'm guessing that a medium is about a size 4-6. This is more of a misses/juniors size than a true woman's size!