US Bra Size to AU Conversion Guide

Swap US bands for the Australian 6–32 scale and keep cup depth aligned with UK-style lettering. Follow the chart, examples, and brand notes to buy Aussie bras without guesswork.

View the conversion chartCheck sister sizes

Covers US bands 28–52 and Australian bands 6–32 with cups AA through K.

Australian bands step by two

US 30 becomes AU 8, US 32 becomes AU 10, and so on up the scale.

Double letters stay in play

Australia follows the UK pattern, so DD, E, F, FF, G, GG remain part of the size range.

Know your retailer

Some Australian sites list both AU and US sizes—use the AU column when converting from US labels.

US to AU band and cup mapping

Convert your US band to the 6–32 Australian scale and keep the corresponding cup letter.

US labelAU labelNotes
28A6AUS 28A converts to AU 6A on a two-step band scale.
28B6BUS 28B converts to AU 6B on a two-step band scale.
28C6CUS 28C converts to AU 6C on a two-step band scale.
28D6DUS 28D converts to AU 6D on a two-step band scale.
28DD6DDUS 28DD converts to AU 6DD on a two-step band scale.
28E6EUS 28E converts to AU 6E on a two-step band scale.
28F6FUS 28F converts to AU 6F on a two-step band scale.
28G6GUS 28G converts to AU 6G on a two-step band scale.
30A8AUS 30A converts to AU 8A on a two-step band scale.
30B8BUS 30B converts to AU 8B on a two-step band scale.
30C8CUS 30C converts to AU 8C on a two-step band scale.
30D8DUS 30D converts to AU 8D on a two-step band scale.
30DD8DDUS 30DD converts to AU 8DD on a two-step band scale.
30E8EUS 30E converts to AU 8E on a two-step band scale.
30F8FUS 30F converts to AU 8F on a two-step band scale.
30G8GUS 30G converts to AU 8G on a two-step band scale.
32A10AUS 32A converts to AU 10A on a two-step band scale.
32B10BUS 32B converts to AU 10B on a two-step band scale.
32C10CUS 32C converts to AU 10C on a two-step band scale.
32D10DUS 32D converts to AU 10D on a two-step band scale.
32DD10DDUS 32DD converts to AU 10DD on a two-step band scale.
32E10EUS 32E converts to AU 10E on a two-step band scale.
32F10FUS 32F converts to AU 10F on a two-step band scale.
32G10GUS 32G converts to AU 10G on a two-step band scale.

Convert your size in four steps

  1. Confirm your US starting size Measure snug underbust and bust or pick a US bra that already fits well.
  2. Replace the band with the AU number Use the chart to translate the inches-based band to the Australian 6–32 system.
  3. Check sister sizes if needed If the AU band feels different, shift to the neighbouring band and adjust the cup with a sister size.
  4. Verify fabrics and wires Australian brands often follow UK construction—try nearby sizes before removing swing tags.

Worked conversion examples

US 30DD -> AU 8DD

US 30DD translates to AU 8DD with the same cup depth.

US 32F -> AU 10F

US 32F becomes AU 10F—just relabel the band.

US 34DD -> AU 12DD

US 34DD converts to AU 12DD for staples from Berlei or Bendon.

US 36G -> AU 14G

US 36G maps to AU 14G when shopping high-support Aussie styles.

Brand sizing cheat sheet

Use these notes to bridge American labels and Australian tags.

US-based retailers

  • Nordstrom
  • Bare Necessities
  • HerRoom
  • Amazon US

Convert before ordering AU brands from Nordstrom, Bare Necessities, or other US marketplaces.

Australian labels

  • Bras N Things
  • City Chic
  • Berlei
  • Bendon

Bras N Things, City Chic, Berlei, and Bendon publish AU sizes first, with UK/US references secondary.

Global marketplaces

  • THE ICONIC
  • David Jones
  • Amazon AU
  • Figleaves

Retailers like THE ICONIC and David Jones list AU sizes but often display US conversions in size guides.

Fit tips after converting

  • Remember AU bands increase by two—use sister sizes if you need a tighter or looser fit.
  • UK-derived cups can run firm; read fabric notes for sports bras and high-support styles.
  • Save both AU and US labels in your fit notes to make reorders quick.

Helpful tools

Interactive bra size calculator

Measure in inches or centimetres and generate both local and international sizes in one place.

Open

International bra size guide

Compare regional systems side by side and review conversion advice for cross-border shopping.

Open

Sister size navigator

Adjust bands tighter or looser while holding cup volume steady after you convert.

Open

US to AU conversion FAQ

How do Australian band numbers compare to US?

Australian bands start at 6 and increase by twos. Use the chart to match each US band to its AU partner.

Do Australian cups use double letters?

Yes. AU sizing follows the UK-style sequence, keeping DD, E, F, FF, and so on. Match the cup shown in the table.

What if the converted band feels different?

Switch to the neighbouring AU band and adjust the cup using sister sizes just as you would in the US.

Where can I buy Australian-sized bras?

Australian retailers like Bras N Things and City Chic plus sites such as THE ICONIC or Amazon AU stock AU-labelled bras.