Bras N Things to Goddess bra size

The short answer

Bras N Things 12G is Goddess 34FF by the two brands' own charts.

Cups are counted along each brand's own letter order, and the band is carried across unchanged.

Every Bras N Things size read across to Goddess. AU sizes on the left, UK on the right.
Bras N Things	Bras N Things builds it for	Goddess, by chart	Same label	Goddess builds it for	Goddess also prints
12A	not published	not made	not published	not published	not published
12B	not published	not made	not published	not published	not published
12C	not published	34C	not published	not published	US C · EU C · FR C · AU C
12D	not published	34D	not published	not published	US D · EU D · FR D · AU D
12DD	not published	34DD	not published	not published	US DD · EU E · FR E · AU DD
12E	not published	34E	not published	not published	US DDD · EU F · FR F · AU E
12F	not published	34F	not published	not published	US G · EU G · FR G · AU F
12G	not published	34FF	not published	not published	US H · EU H · FR H · AU FF

Tinted rows change label or sit between two sizes. 2 sizes have no counterpart on the Goddess chart. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.

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Sources

Bras N Things size guide, read on 2026-09-18.
Goddess size guide, read on 2026-09-18. Goddess on TrueToSize

Goddess to Bras N Things