International conversions Nov 13, 2026 3 min read
Bra Size Conversion: US to Australia
Australian bras use dress-size band (8, 10, 12, 14) instead of inches. AU 12 = US 34. Cup letters use UK sequence (A, B, C, D, DD, E, F, FF, G).
The Chart
| US Band | AU Band | Cup System |
|---|---|---|
| 30 | 8 | UK letters |
| 32 | 10 | UK letters |
| 34 | 12 | UK letters |
| 36 | 14 | UK letters |
| 38 | 16 | UK letters |
| 40 | 18 | UK letters |
| 42 | 20 | UK letters |
| 44 | 22 | UK letters |
FAQs
Why AU bands use dress sizes?
Historical Australian convention. Dress size 12 maps to underbust 32-33" / 81-84cm. Bra makers in AU/NZ adopted the same numbering for consistency with apparel.
Berlei, Bras N Things, Bonds — same sizing?
Yes, mostly. Australian bra brands use AU 8-22 with UK cup letters universally. Same size from different AU brands fits comparably.
Need this on your store?
Tailor Size Guide ships pre-built size charts for Shopify.