I usually order an X or a 1X but reviews said to size up. I ordered the 2X and it would be the same size as a regular large. It is really stretchy so I was able to try it on, but it was very tight and stopped just at the top of my pants which is short to me. I had a couple friends who are not plus size, try it on and both looked to tight, even though it is a 2X! Maybe I received a poorly made one, but this shirt is not made for plus size.