How to determine your primary body type?

I'm dainty petite (5.3') boyish. My shoulders are wider than my hips. I have a long neck. My chest is small. I have a waist( I think I 'm short wasted), narrow hips, and pancake flat bottom. Am I inverted triangle, rectangle, or lean hourglass?

What should I pay most attention to when selecting a garment: being petite, being short wasted or my primary body type? Thank you.