The shirt is quite form fitting, with the sleeves being slightly looser. It's a snug fit, though not overly so. The shirt rides up a little, so you have to make sure your tights aren't pulled too low.
Overall, pretty satisfying.
Beautiful, satin finish (not shiny), matches my microfiber. "Eurotard" tights perfectly--like a unit from same fabric. Perfect length: covers with no exposed waist in performance, and also no excess ovelrap for a professional, attractive body line. WOW!
At 5'6" and 140lbs, I ordered a large in this T-shirt. It fits well, not too tight (i.e. that's exactly what I wanted), but still just snug enough to not be floppy/loose. The fabric is very smooth & soft, and seems to be heavy enough to stand up to a lot of long-term use. I've worn it to 2 classes so far, and I'm pleased with it. In fact, I was so pleased with it, I ordered 3 more!