US Size 40DD in AU — Women's Bras
US 40DD =
AU 18DD
United States (US) women's bras size 40DD converts to Australian (AU) size 18DD. This is a standard conversion used across most major bras brands and retailers.
When shopping from Australian brands like Berlei, Bonds, Bras N Things, look for size 18DD on the label. Keep in mind that sizing can vary slightly between brands, so always check the specific brand's size chart if available.
For reference, one size down (US 40D) is AU 18D, and one size up (US 40DDD) is AU 18E. If you're between sizes, most fitting guides recommend sizing up for comfort.
This conversion is especially useful for international shoppers purchasing women's from Australian retailers or ordering United States-sized products from brands like Victoria's Secret or ThirdLove to ship internationally.
Quick Converter
US 40DD =
AU 18DD
Full US to AU Women's Bras Size Chart
| US | AU |
|---|---|
| 30A | 8A |
| 30B | 8B |
| 30C | 8C |
| 30D | 8D |
| 30DD | 8DD |
| 32A | 10A |
| 32B | 10B |
| 32C | 10C |
| 32D | 10D |
| 32DD | 10DD |
| 32DDD | 10E |
| 34A | 12A |
| 34B | 12B |
| 34C | 12C |
| 34D | 12D |
| 34DD | 12DD |
| 34DDD | 12E |
| 36A | 14A |
| 36B | 14B |
| 36C | 14C |
| 36D | 14D |
| 36DD | 14DD |
| 36DDD | 14E |
| 38A | 16A |
| 38B | 16B |
| 38C | 16C |
| 38D | 16D |
| 38DD | 16DD |
| 38DDD | 16E |
| 40A | 18A |
| 40B | 18B |
| 40C | 18C |
| 40D | 18D |
| 40DD | 18DD |
| 40DDD | 18E |
| 42A | 20A |
| 42B | 20B |
| 42C | 20C |
| 42D | 20D |
| 42DD | 20DD |
| 42DDD | 20E |
Frequently Asked Questions
- What is US women's bras size 40DD in AU?
- US women's bras size 40DD is equivalent to AU size 18DD.
- Is US size 40DD the same as AU size 18DD?
- Yes, US size 40DD and AU size 18DD are equivalent in women's bras sizing. However, fit may vary slightly between brands.
- What if US size 40DD is too small — what's the next size up in AU?
- The next size up from US 40DD is US 40DDD, which converts to AU 18E.