Fantasie to Nike bra size

The short answer

Fantasie 34DD is Nike 34E by the two brands' own charts. 2 of 4 Fantasie sizes land on a different label at Nike.

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

Every Fantasie size read across to Nike. US sizes on the left, US on the right.
Fantasie	Nike, by chart	Same label	Nike also prints
34D	34D	not published	not published
34DD	34E	not published	not published
34DDD	34F	not published	not published
34G	34G	not published	not published
34H	not made	not published	not published
34I	not made	not published	not published
34J	not made	not published	not published
34K	not made	not published	not published
34L	not made	not published	not published
34M	not made	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. 6 sizes have no counterpart on the Nike 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

Fantasie size guide, read on 2026-09-17. Fantasie on TrueToSize
Nike size guide, read on 2026-09-18. Nike on TrueToSize

Nike to Fantasie