Harper Wilde to Natori bra size

The short answer

Harper Wilde 34D is Natori 34D by the two brands' own charts. 0 of 6 Harper Wilde sizes land on a different label at Natori.

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

Every Harper Wilde size read across to Natori. US sizes on the left, US on the right.
Harper Wilde	Harper Wilde builds it for	Natori, by chart	Same label	Natori builds it for	Natori also prints
34A	not published	34A	not published	not published	not published
34B	not published	34B	not published	not published	not published
34C	not published	34C	not published	not published	not published
34D	not published	34D	not published	not published	not published
34DD	not published	34DD	not published	not published	not published
34DDD	not published	34DDD	not published	not published	not published

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

Harper Wilde size guide, read on 2026-09-18. Harper Wilde on TrueToSize
Natori size guide, read on 2026-09-17. Natori on TrueToSize

Natori to Harper Wilde