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How Australia Sizing Actually Works
Like the UK, Australia measures bands in inches and uses the extended cup ladder (DD, E, F, FF, G, GG, H) rather than the US’s repeating D’s.
Local brands and imported UK stock generally agree on sizing, which makes Australia one of the more consistent markets to shop in.
Convert Your Size
Use the calculator above to see your size across all 7 systems this site supports, Australia included. If you already know your size in another system, enter it into the Global Bra Size Converter instead of doing the math by hand.
Getting an Accurate Starting Point
The conversion is only step oneHow to Measure explains the exact measuring method this page assumes, and the Sister Size Calculator helps fine-tune things if your first size guess isn’t quite right.
A Worked Example for Australia
Say your underbust measures 34 inches and your bust measures 38 inches. A US 34D.
Converted to Australia’s system, that becomes roughly 34″ D using the formula above. Run your own numbers through the calculator on this page rather than eyeballing the conversion. Small rounding differences near a size boundary can shift the result by a full cup letter.
Shopping Locally vs. Importing in Australia
Australian stores commonly carry a wide band range but a narrower cup range than US retailers, so shoppers at the fuller end of the scale often do better ordering from a specialist online.
Common Sizing Mistakes Shoppers Make in Australia
A common Australian mistake is assuming a UK cup letter and an Australian cup letter always match, when in practice they’re close but not guaranteed to be identical at every band size.
Shoppers also sometimes forget that Australian retailers occasionally use their own house-brand size labels that don’t map cleanly onto the standard AU band/cup system described here.
A Note on Retail Fitting in Australia
Australian specialty lingerie retailers are known for detailed fitting consultations, particularly useful for shoppers at the fuller end of the band or cup range.
Shopping Locally vs. Ordering From Overseas
Local Australian retailers typically offer easier returns and faster delivery than ordering internationally, which matters more for a fit-uncertain buy like a first bra in a new size than for items where exact fit is less critical.
Geographic Isolation Shapes Retail Options
Australia’s distance from major manufacturing and retail hubs has historically meant a narrower range of imported brands compared to markets like the UK or US, which is part of why specialty and online-only retailers play a bigger role in extended-size availability here.
UK Influence Runs Deep
Australian sizing conventions trace closely to UK conventions due to historical trade and retail ties, which is generally good news for anyone converting between the two. Expect closer alignment than between more distantly-related systems.
Shipping Times From Overseas Retailers
Ordering extended sizes from UK or US retailers not stocked locally often means longer shipping times. Factor this in if you need a specific size for a deadline rather than assuming next-day domestic-style delivery.
