Hi all. Today I thought I would treat myself ot a new bra and I would get a proper fitting at m&s. I am not 100% sure what I currently wear because my bras are that old the labels have washed off, but they are definitely ill fitting- a little too small. I know I bought a c up and I think it may have been a 36 back size. I have put a little bit of weight on going from a size 12 (sometimes 14) to pretty much always a 14 now. But since putting on weight my bras are a bad fit
Anyway, so at the fitting the lady said she measured the back size but went on cup size by eye. She said that I definitely wasn't a c and she thought a d or double d. But she said I was a 38 back size. So she brought some bras in 39d to begin with and told me I was that size. Seemed OK. The full cup I think was a little large but I settled on some plunge style bras. So I just got in and tried them properly and I think they're too large. I have them on the smallest loops and they gape on the cup at the bottom and feels like it moves up when I put my arms up. So I will take them back.
My question is... is 38 back size large for a size 14? How does back size work in comparison to dress size? Or is it the cup size that is too big? I haven't really got time to have another proper fitting, so I was hoping to just swap them.