Fantasie to Marks & Spencer bra size
The short answer
Fantasie 34I is Marks & Spencer 34G by the two brands' own charts.
Cups are counted along each brand's own letter order, and the band is carried across unchanged.
| Fantasie | Fantasie builds it for | Marks & Spencer, by chart | Same label | Marks & Spencer builds it for | Marks & Spencer also prints |
|---|---|---|---|---|---|
| 34D | not published | 34D | not published | not published | not published |
| 34DD | not published | 34DD | not published | not published | not published |
| 34DDD | not published | 34E | not published | not published | not published |
| 34G | not published | 34F | not published | not published | not published |
| 34H | not published | not made | not published | not published | not published |
| 34I | not published | 34G | not published | not published | not published |
| 34J | not published | 34GG | not published | not published | not published |
| 34K | not published | 34H | not published | not published | not published |
| 34L | not published | not made | not published | not published | not published |
| 34M | not published | 34J | not published | not published | not published |
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.
Sources
- Fantasie size guide, read on 2026-09-17. Fantasie on TrueToSize
- Marks & Spencer size guide, read on 2026-09-18.