BF Sale-Marie corsetThe corset cup has push up inside, which can provide perfect support. Please check our size chart on the pictures ; Choose the size based on your bust and waist size,If your bust size is bigger ,you can choose one size up ; If your bust size is smaller ,you can choose one size down. The back adopts a tethering method and can be adjusted 2 5 inches (5 15CM) according to the waist. B cup can suitable for your cup A B or C ; C cup can suitable for your