Bras N Things to Freya bra size

The short answer

Bras N Things 12G is Freya 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 Freya. AU sizes on the left, UK on the right.
Bras N Things	Freya, by chart	Same label	Freya also prints
12A	not made	not published	not published
12B	34B	not published	US B · EU B · FR B · AU B
12C	34C	not published	US C · EU C · FR C · AU C
12D	34D	not published	US D · EU D · FR D · AU D
12DD	34DD	not published	US DD · EU E · FR E · AU DD
12E	34E	not published	US DDD · EU F · FR F · AU E
12F	34F	not published	US G · EU G · FR G · AU F
12G	34FF	not published	US H · EU H · FR H · AU FF

Neither chart publishes the body each size is built for, so the rows line up the labels. Tinted rows change label or sit between two sizes. 1 sizes have no counterpart on the Freya 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.
Freya size guide, read on 2026-09-17. Freya on TrueToSize

Freya to Bras N Things