I was going to guess at 8.5 and 8.0 as well.
What is surprising to me is that I am just under 5'3" and when I was 9.12 I looked TONS fatter than her. Like, tons! More than just 12 pounds or less, yet I'm only an inch and a bit shorter.
I think it's so much to do with proportion, shape, frame size, leg length, muscle tone, all that stuff.
A friend of mine recently tried some new dresses of mine on, which were all a size 12. She is not very slim but she is certainly slimmer than me. She went
at me when she saw they were size 12s, thinking I must be a 14 at the very least, and a 16 on a bad day.
So imagine her utter despair, bewilderment and wounded indignation when she could not get my dresses done up across her back - and my boobs are bigger than hers!
She is just obviously has a much larger frame than me, and I have a small rib cage and waist. But even on the hips they were snug on her, and yet her hips give the impression of looking slimmer than mine.