Breast sizes (I am confused)

[The dirt bird]

I can't understand how girls are measuring their breasts around here as there are so many who seem to get it wrong in my opinion. (I am thinking of offering a free measuring service for escorts lol)
I have met girls who claimed to have D cup breasts that were clearly no more than an ample B cup and there are girls with larger breasts who think they are smaller........
The Irish and Uk girls seem to get it spot on but the other European girls seem to be way off to me.
Is there different measurements in other countries ?
Here is an example I looked at Claudia's profile when I got back and she looks to have at least C cup or D cup breasts by the photos but she is advertised as B cup ?
Is my breast sense off ? Do I need recalibration ?
Here is a link
https://www.escort-ireland.com/escor...le-escort.html

Maybe klittylicker my tech guy might attach the photos lol