I recommend looking at Pact's size chart, not relying on the chart provided by Amazon. I usually wear a size 12/14, but 34C top. The medium fit me perfectly. I like how the elastic in the shelf bra is completely covered by the cotton. Super-comfortable with no itch or elastic marks. I don't love the small logo on the back, but if this top is like my Pact leggings, the rubber will rub off after a few washes.