Usually wear a medium but I bought a large months ago to wear it as a tunic. Fit is just expected, loose and roomy. The material is airy and very comfortable to wear in summer's humid heat. I liked it so much I bought a medium wanting a more fitted look for work.  Although the medium fits nicely, the sole chest pocket is too close to arm seam.  Either that or the pocket is too wide in proportion to the shirt size. Compared it to the large one I have had for month, looks like for the large loose fit, the pocket is always slouched thus making the look less obvious. However in a medium size and more fitted wear, it looked as if I had a pocket grown out of my armpit. So I'm returning it promptly because it is not proper for work.