After reading the reviews that mentioned, if you wanted a loose fit to go up a size because it will also shrink some after washing, which is what I did & it was exactly how I like my tops to fit.  I love polo like shirts & really like the 3/4 sleeves because many of the short sleeves are to short for my liking (for my flabby under arms).
I would recommend this shirt & will purchase in another/other colors.