Harper Wilde to Chantelle bra size

The short answer

Harper Wilde 34DD is Chantelle 34E by the two brands' own charts. 2 of 5 Harper Wilde sizes land on a different label at Chantelle.

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

Every Harper Wilde size read across to Chantelle. US sizes on the left, US on the right.
Harper Wilde	Chantelle, by chart	Same label	Chantelle also prints
34A	not made	not published	not published
34B	34B	not published	not published
34C	34C	not published	not published
34D	34D	not published	not published
34DD	34E	not published	not published
34DDD	34F	not published	not published

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 Chantelle 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

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

Chantelle to Harper Wilde