Marks & Spencer to Harper Wilde bra size
The short answer
Marks & Spencer 34D is Harper Wilde 34D 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 | Harper Wilde, by chart | Same label | Harper Wilde also prints |
|---|---|---|---|
| 34AA | not made | not published | not published |
| 34A | 34A | not published | not published |
| 34B | 34B | not published | not published |
| 34C | 34C | not published | not published |
| 34D | 34D | not published | not published |
| 34DD | 34DD | not published | not published |
| 34E | 34DDD | not published | not published |
| 34F | not made | not published | not published |
| 34G | not made | not published | not published |
| 34GG | not made | not published | not published |
| 34H | not made | not published | not published |
| 34J | not made | not published | not published |
| 34K | 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
- Marks & Spencer size guide, read on 2026-09-18.
- Harper Wilde size guide, read on 2026-09-18. Harper Wilde on TrueToSize