How does Primark bra sizing run?
Primark is labelled in UK sizing. In-store only. Surprisingly good basics. Below is how a Primark size translates across all eight regional standards, plus sister sizes and where to buy.
Primark size range & system
Primark sizes in UK.
Primark size conversion chart
Each row is one Primark cup size read across the eight standards. The UK column (highlighted) is how Primark labels its bras.
| US | UK | EU | FR | IT | AU | JP | IN |
|---|---|---|---|---|---|---|---|
| A | A | A | A | A | A | A | A |
| B | B | B | B | B | B | B | B |
| C | C | C | C | C | C | C | C |
| D | D | D | D | D | D | D | D |
| DD | DD | E | E | E | DD | E | DD |
| DDD | E | F | F | F | E | F | E |
Band conversions are exact; cup fit still varies by brand, style, and body — a conversion is a starting point, not a guarantee.
Common Primark sizes
Open the full eight-standard conversion for a specific size:
Sister sizes in Primark
If a Primark bra fits in the cup but the band is off, your sister size keeps the same cup volume with a different band — go down a band and up a cup, or up a band and down a cup. Example: a 34D and a 32DD hold the same cup volume.
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Primark sizing FAQ
- Does Primark run true to size?
- UK sizing. Ultra-budget. In-store only. Surprisingly good basics.
- What sizing system does Primark use?
- Primark is labelled in UK sizing. Use the conversion table above to read your size across US, UK, EU, FR, IT, AU, JP and IN.
- What is a 34D in Primark in EU sizing?
- A US 34D converts to EU 75D. Band conversions are exact; cup fit still varies by brand, style, and body — a conversion is a starting point, not a guarantee.