I'm a 12 on bottom. I'm tall, so looks can be deceiving.
I just got a charcoal suit jacket from Express and it's also a size 12. But I have a Tahari blazer that's a 6. Wide range there, but I run about a 10 on top, average I'd say. But my booty? Yeah, it's not going anywhere anytime soon lol.
5'10", HW: 326/SW: 280/CW: 181/Goal: 165