Ok have NC for this.
I am pretty sure I've got the right size but just want some comments from experts.
Having spent most of my life in 34A or 34B I am now wearing 30Ds in the main.
My underbust measurement is 29.5 ( or 29 pulling tape tight.)
Leaning over and dangling it all, is 35.
I wear a 30D most of the time or a 32D. Very occasionally 32C.
I don't have big boobs but they are quite rounded and pert.
If I go into a 30DD I find that most bras have much thicker back bands, triple hooks and thicker straps. This doesn't look or feel right on me because I'm really tiny and feel too upholstered.
The other problem is that I have small shoulders and many straps are set too wide apart. They end up cutting into my armpits or slipping off.
I get on best with plunge styles rather than balcony.
Now..the question is, how tight should the band be? 30 back is tight sometimes but a 32 which feels more comfy, fastens on the first (tightest) hooks and feels a bit loose. So I'm assuming this is too loose when the bra stretches in wear.
I think the problem is I either have to choose too tight a band or slightly too loose.
Any ideas?