Potions Library Women's Button UpSTOP! Do this before purchasing: 1. Find a shirt that you own that fits you well. 2. Lay the shirt flat and measure across shoulders, across the chest under the arm pits, and across the waist. 3. Compare those measurements to the size chart provided to find your size. This women's button up is tapered at the waist, sizing up is recommended if you like a loose fit. I accept returns and exchanges (provided I have stock) but you're responsible for all