Marie Jo’s four rules of thumb for a well-fitting bra

1. The back panel - The back panel should not ride up above the clasps at the front. 

2. The cups - The breasts should fill the cups nicely, with a beautiful, fluent line between cup and breast. 

3. The clasps and the front piece - The clasps and the front piece should be flat against the chest (not against the breasts). 

4. The straps - Straps must not be so tight that they pinch the shoulder or so loose that they fall off the shoulder.