I believe in being brutally honest, so here goes. I am 5'6, 163lbs, classed as overweight, have a pregnancy apron belly, and the medium fits me loosely. I have to wear "Tall" sizes at Old Navy because my torso is long, but this shirt hoodie covers just fine. My arms are a bit short, so the sleeves do not have the short problem with me. The material is NOT see through, it's very comfortable. You are safe purchasing this and you may want it in every color.See full review