Women's Left Chest prints need to be in the sun, not the shade. When I was learning t's the owners wife was... well... gifted in that area, and her advice on "sun and shade" has stuck with me. We move 1/2 down and 1/2 out on every size as they get larger for most L/C prints, but women's shirts can sometimes break the rule, particularly scoop and V-necks.
