I lucked out and got the perfect size. I'd say the size chart provided is accurate. I was a little surprised with the material. It is 100% polyester, but it just feels different than I expected - like more rubbery than soft, but still stretchy and comfortable. The silver is really shiny and pretty and has that rainbow effect in certain lights. It zips up the back and ties around the neck AND there is underwire in the top! I really love it! It is very flattering!