I have used this since I had my baby 3 months ago and it has been fine. I used it a ton for the first few weeks. I am about size 36/38 D since my milk came in. I got a large and it has fit me just fine. I am 5'7" and weigh 170 pounds (3 months after baby) so I am an average sized woman.

The material is pretty thin and it's not very supportive but it was great for me to lounge around the house in and wear at night. I'm glad I didn't spend a lot on another type of sleep bra.