How do you measure your bra size?
How do you measure your bra size?
user
I’m happy to help you with that.  I can measure both your shoulder width, as well as your bust size and use these to calculate your bra size.
assistant
So how would I do that?
user
Here are some different measurements that you could take.  You can measure your bust and your shoulders with your arms straight down, while bending forward from the waist.  The same goes for your waist.  Then you can take the difference between these measurements.  This gives you the “bust-waist-shoulder ratio”.  The “BRA measurement” is a ratio of that, and in a later section, I’ll explain how you can compare the “chest-to-waist-to-hip” and “bust-to-waist-to-hip” ratios.
assistant
That is not how you measure for a bra. The bra has nothing to do with your shoulder or your waist!
user