These are a great fit. They don't cling in the underarm area and are not skin tight. I am 5'4", 170 pounds (37ish inch waist, for reference), and I ordered the large. Not tight, and not super flow-y. I would say I am a large size in most tank tops/t-shirts, so definitely order the size that you would usually get unless you want it especially tight/loose. The colors are great and I saw no loose threads upon taking them out of the package.