I fitted a lady once as a 40G and her boobs and overall bodyshape and size were pretty similar.
When you do a fitting, I guess (as you've proved here) you have a pretty good idea what size to start before you've done any measuring. I find women with clothes on can look a different size than with clothes off - sometimes bigger sometimes smaller. I guess even that you'd account for.
Are some physiques trickier than others - or are they all estimate, measure and try a size - or do you get some that just don't follow the normal rules of bra fitting?
I'd been trying to remember this girls name.
Ashley Ellison - https://www.boobpedia.com/boobs/Ashley_Ellison - 32K?
It is alleged that by October 2007, she had grown to a 32JJ bra. It was during 2008, however, that she decisively changed the nature of her body shape, gaining over 30lbs in additional weight and planting herself firmly in the "chubby" or "mid-sized" erotica market.
When she relaunched her career with the SCORE Group in early 2009, her bra size by then was 36J. Since then there has been a slight weight loss from her previous weight increase and, as of March 2013, her website is once again reporting her bust as being 32JJ/K.
Every fitting is different (it’s been a while since I did it professionally, but I still help friends etc when needed), but there was a time when I would do 3-4, sometimes up to 10 or more per day. You get an instinct for it, largely because while everyone is a different shape and size, you get to know those shapes and sizes. I can usually do a quick visual check (even with the person wearing clothes and a bra) and get pretty close (usually on the money) as to what their size is. It almost seems like a magic trick, but it’s just experience and intuition at work. The most difficult assessments tend to be at the extreme ends of the spectrum (really skinny, small boobed women - or larger, curvier women). Another thing is that averages come in to play - I tend to know that most women will be in the back size range of anywhere between 28-36, and from their approximate back size, I can glance at their boobs and think “okay, that’s going to be roughly a 32G”). But it still requires trying on 2 or 3 bras (from different manufacturers) to figure out how comfortable they are on, and if they suit the person. A Panache bra fits differently from a Curvy Kate, a balconette bra fits differently from a full cup etc. But even in everyday life, I can glance at a woman in a restaurant and do a quick assessment that covers posture, how her boobs are set in her current bra, if the back band is riding up or too low (if it’s showing through her outfit or I can see an outline), if her shoulder straps are digging, her projection, her shape and overall size, if she’s got jiggle/wiggle when she moves etc - and I can usually say “that bra doesn’t fit” or “she needs to go up a cup size” or “she’s probably a 30FF” or “that looks like a 32J”.
Okay, Ashley. This is an interesting girl, as she seems to have started modelling young - with quite big boobs initially anyway. And, then we see her move into her late teens and into her early 20s, which is when the spread happens to most women (it happened to me around age 23-25, where I just gained so much weight on my thighs, arse and boobs). All sorts of reasons can be blamed (reduced activity, kids, the pill, pregnancy, eating more, general growth etc).
Based on the most recent pics (I don’t know if she models any more or not), then I reckon 34-36H/HH might be more accurate, as she looks quite tall and broad. 36J might also work for her - but there’s some photos she seems bigger and broader than others, so a 34 or 36JJ might not be unusual.