Christian Dior boutique Paris white dress shirt. This is an uniquely designed shirt with collar, a button at the collar, and hook in the waistline. When wear open without the hook, it can be worn as a shirt jacket. When wear with the hook, it creates a rather slimmer waist, which I don't believe fits a size 12. Please see measurements for the accurate fit.
Laying flat measurements:
Shoulder to shoulder 21"
Pit to pit 21"
Waist 13.5" when hooked
Dior White Dress Shirt Blouse 26939018 PUXKYKX