i usually can wear small to medium shirts, but this shirt runs ssn smalllll. what since does it make to get a XL shirt if it depends on the material I can wear like I said smalls to mediums. Otherwords, the shirt runs so small I would've had to purchase a XL. It's the stitching. Whoever sewed the shirt stitched to high causes you not to be able to put both your arms in without the stitch ripping. i tried to return but it was too late.