ThirdLove to Goddess bra size

The short answer

ThirdLove 34F is Goddess 34E by the two brands' own charts.

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

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

ThirdLove size guide, read on 2026-09-17. ThirdLove on TrueToSize
Goddess size guide, read on 2026-09-18. Goddess on TrueToSize

Goddess to ThirdLove