The Emerson Top is a flowy style, with a slight peplum flare.
A bit of an over sized fit, you may wish to size down if you prefer a more fitted style.
Measurement across the bust, with the garment laying flat (double for circumference):
Small 18.5" // Medium 20" // Large 20.5" // XL 21.5" // 2XL 22" // 3XL 25"