Marks & Spencer to PrimaDonna bra size
The short answer
Marks & Spencer 34F is PrimaDonna 75G by the two brands' own charts.
Cups are counted along each brand's own letter order, and the band is carried across unchanged.
| Marks & Spencer | Marks & Spencer builds it for | PrimaDonna, by chart | Same label | PrimaDonna builds it for | PrimaDonna also prints |
|---|---|---|---|---|---|
| 34AA | not published | not made | not published | not published | not published |
| 34A | not published | not made | not published | not published | not published |
| 34B | not published | 75B | not published | not published | UK B · US B |
| 34C | not published | 75C | not published | not published | UK C · US C |
| 34D | not published | 75D | not published | not published | UK D · US D |
| 34DD | not published | 75E | not published | not published | UK E · US DD |
| 34E | not published | 75F | not published | not published | UK F · US DDD |
| 34F | not published | 75G | not published | not published | UK G · US G |
| 34G | not published | 75I | not published | not published | UK I · US I |
| 34GG | not published | 75J | not published | not published | UK J · US J |
| 34H | not published | 75K | not published | not published | UK K · US K |
| 34J | not published | 75M | not published | not published | UK M · US M |
| 34K | not published | not made | 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
- Marks & Spencer size guide, read on 2026-09-18.
- PrimaDonna size guide, read on 2026-09-18.