Ordered my normal size and while it’s a tight fit it does give after a bit of wear. To be honest, if it didn’t fit close it wouldn’t work and it does! Bought it for running and it’s perfect for the job. While it isn’t a racer back style, it’s fit and support is excellent. It also means you don’t have to be double jointed and ambidextrous to put it on which is a big plus. Not the nicest looking sports bra but if you are bigger up top the support and lack of movement is your main concern.
or You can buy it here