Fits as expected if you order based on your pre-pregnancy size. I was a 32B pre-pregnancy and am a 32C while nursing and I ordered a small. It fits great and breathes and washes well. These are VERY comfortable to wear and were sorely needed when I couldn't stand wearing a bra with underwire when my milk came in. I don't want to stretch out the material so I lift the bra up from the bottom to nurse, but after one month so far (and very frequent washings) the elastic is as strong as when it was first purchased.