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Original poster

Apparently I'm a bra size 30GG!!!

57 replies

Notasbigasithink · 25/01/2026 12:04

So I've been breast feeding for about 18mths now and let's just say all the meat has gone from my boobs! They were a lovely, pert 34D pre baby and now look like sagging, 2inches lower, deflated balloons.....
Out of interest, I thought I'd do the boob or bust online measurements to see what sort of bra size I'm potentially looking at now they've changed shape etc and apparently I'm a 30GG!!! How is this possible when they're sagging and lost top volume/fullness?! Is this even a plausible size in real women? I'm loathed to spend £40 on a bra thats a 30GG only to have to send it back hugely disappointed.
Anyone else done the boob or bust measurements and actually fit into the size stated/recomended?
YNBU - Enjoy your apparently giant boobs and buy lots of new fabulous bras
YABU - Your delusional of your saggy post breastfeeding boobs and stick to drab sports bras

OP posts:
Original poster
Notasbigasithink · 25/01/2026 12:13

AnnaMagnani · 25/01/2026 12:09

Had you done Boob or Bust pre-baby? I think you are shocked as you have gone from a 34D to a 30GG but presumably you were actually a 30 band all along.

30F (the sister size to 34D) to 30GG doesn't sound such a shocking change.

Interesting! I just wore a 34D because it was whatsoever to fit and give me a relatively decent shape.
I don't understand what a sister size is? Surely a 34D is just that??

OP posts:
dementedpixie · 25/01/2026 12:11

I was fitted as 40C by M&S but am actually 36GG
You were probably in the wrong size pre baby

330ml · 25/01/2026 12:11

I got fitted in Bravissimo and came out with 28FF and a 28G. Different brands.

It sounds enormous but it isn’t at all.

But seems odd to go from 34 to 30 unless you’ve lost lots of back fat since you were last measured

I went from a 32 to a 28 just by walking into the fitting room. There isn’t any fat on my back.

dementedpixie · 25/01/2026 12:10

Im guessing your last bra was fitted by adding 4 to your under bust measurement giving a bra too big in the back and too small in the cup

CombatBarbie · 25/01/2026 12:10

SundayFundayz · 25/01/2026 12:08

YABU to ask if this is a plausible size… of course it is.
But seems odd to go from 34 to 30 unless you’ve lost lots of back fat since you were last measured.

Or wearing the wrong size to begin with, im a 32ff but used to wear a 34dd

AnnaMagnani · 25/01/2026 12:09

Had you done Boob or Bust pre-baby? I think you are shocked as you have gone from a 34D to a 30GG but presumably you were actually a 30 band all along.

30F (the sister size to 34D) to 30GG doesn't sound such a shocking change.

SundayFundayz · 25/01/2026 12:08

YABU to ask if this is a plausible size… of course it is.
But seems odd to go from 34 to 30 unless you’ve lost lots of back fat since you were last measured.