PrimaDonna to ThirdLove bra size
The short answer
PrimaDonna 75E is ThirdLove 34E by the two brands' own charts.
Cups are counted along each brand's own letter order, and the band is carried across unchanged.
| PrimaDonna | ThirdLove, by chart | Same label | ThirdLove also prints |
|---|---|---|---|
| 75B | 34B | not published | not published |
| 75C | 34C | not published | not published |
| 75D | 34D | not published | not published |
| 75E | 34E | not published | not published |
| 75F | 34F | not published | not published |
| 75G | 34G | not published | not published |
| 75H | 34H | not published | not published |
| 75I | not made | not published | not published |
| 75J | not made | not published | not published |
| 75K | not made | not published | not published |
| 75L | not made | not published | not published |
| 75M | not made | 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
- PrimaDonna size guide, read on 2026-09-18.
- ThirdLove size guide, read on 2026-09-17. ThirdLove on TrueToSize