This is my third time purchasing this shirt (only because I keep losing weight and it's my favorite design). The sleeves on the 2X are strangely small, compared to the rest of the shirt. When I bought this shirt in a 4X and then a 3X, the sleeves reminded me of a hockey jersey sleeve...very spacious. The 2X version of this shirt was fitted fitted, so if your arms are big, size up for comfort.