We recommend using a tape measure to find your perfect fit. Measure at the fullest part of your bust wearing a non-padded and non-compressive bra (or no bra!). Measuring tape should be relaxed on your bust. If you're in between sizes, we suggest sizing down for a more compressive fit, or sizing up for a more relaxed fit.
If you're still unsure about your size, drop us a line at firstname.lastname@example.org and we'd be happy to help.