Not wanting to do all the math needed for the sizing chart, I looked up my size on the chart located in the product info. I'm a 36C, so I ordered the XL, and they fit well. I don't have to tell you ladies what it's like to wear a regular bra all day, nor do I like to go around the house without one, so I like sports bras as a weekend go to, and this is a good bra for the job. Very happy with my purchase.