The sizing chart is not helpful and customer serivce was contacted twice about sizing. The have no further measurements than the site contains. I am 40" under the bustline with a 45" bust. I thought the 1x might be snug around the chest but that the 2x might be a bit loose on the cup. I ordered the 2x. I just barely fill out the cup and the chest was about right. If I was larger around the chest it might be snug. The buttons are very cheap. They have been removed. I purchased it so I could make a nice black nightgown and it works for that purpose. My comment to customer service: Get measurements for women bras.