Natori to Bras N Things bra size

The short answer

Natori 34D is Bras N Things 12D by the two brands' own charts.

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

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

Tinted rows change label or sit between two sizes. 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

Natori size guide, read on 2026-09-17. Natori on TrueToSize
Bras N Things size guide, read on 2026-09-18.

Bras N Things to Natori