Australian to US Size Conversion: Complete 2026 Guide for Women and Men
Ordering from a US retailer and not sure what size to pick? This guide covers women's and men's clothing, shoes, and bras with side-by-side charts you can actually use.
Quick answer: For women's clothing, subtract 4 from your Australian size to get your US size (AU 10 = US 6). Women's shoe sizes are identical in both countries (AU 8 = US 8). Men's shoes follow UK sizing, so add 1 for US (AU 9 = US 10). For bras, add 22 to the AU band number (AU 12 = US 34).
Quick Size Converter
Want instant conversions? Our free Size Converter Tool handles Australian, US, UK, and EU sizes for any clothing category.
The Simple Formula for Women's Clothing
The fastest way to convert Australian women's clothing sizes to US sizes: subtract 4 from your Australian size.
Why does this work? Australia adopted British sizing standards, which use numbers that run 4 higher than the American system. An AU 12 and a US 8 describe the same body measurements. The clothes are the same, the labels are just different.
Australian Size − 4 = US Size
Australian 8 → US 4
Australian 10 → US 6
Australian 12 → US 8
Australian 14 → US 10
Australian 16 → US 12
Women's Clothing Size Chart
Here is the full conversion table for women's clothing with US, UK, and EU equivalents. Bookmark this one if you shop across international brands.
| AU | US | UK | EU | Letter |
|---|---|---|---|---|
| AU 4 | US 0 | UK 4 | EU 32 | XXS |
| AU 6 | US 2 | UK 6 | EU 34 | XS |
| AU 8 | US 4 | UK 8 | EU 36 | S |
| AU 10 | US 6 | UK 10 | EU 38 | M |
| AU 12 | US 8 | UK 12 | EU 40 | M/L |
| AU 14 | US 10 | UK 14 | EU 42 | L |
| AU 16 | US 12 | UK 16 | EU 44 | XL |
| AU 18 | US 14 | UK 18 | EU 46 | XXL |
| AU 20 | US 16 | UK 20 | EU 48 | 1X |
| AU 22 | US 18 | UK 22 | EU 50 | 2X |
| AU 24 | US 20 | UK 24 | EU 52 | 3X |
| AU 26 | US 22 | UK 26 | EU 54 | 4X |
Women's Body Measurements by Size
Numbers on a tag mean less than actual body measurements. If a brand's sizing feels off, compare your measurements to their chart instead of relying on the number alone.
| AU Size | Bust | Waist | Hips |
|---|---|---|---|
| AU 4 | 76 cm / 30" | 56 cm / 22" | 82 cm / 32" |
| AU 6 | 80 cm / 31.5" | 60 cm / 23.5" | 86 cm / 34" |
| AU 8 | 84 cm / 33" | 64 cm / 25" | 90 cm / 35.5" |
| AU 10 | 88 cm / 34.5" | 68 cm / 27" | 94 cm / 37" |
| AU 12 | 92 cm / 36" | 72 cm / 28.5" | 98 cm / 38.5" |
| AU 14 | 97 cm / 38" | 77 cm / 30.5" | 103 cm / 40.5" |
| AU 16 | 102 cm / 40" | 82 cm / 32.5" | 108 cm / 42.5" |
| AU 18 | 107 cm / 42" | 87 cm / 34" | 113 cm / 44.5" |
| AU 20 | 112 cm / 44" | 92 cm / 36" | 118 cm / 46.5" |
| AU 22 | 117 cm / 46" | 97 cm / 38" | 123 cm / 48.5" |
How to measure yourself
- Bust: Wrap the tape around the fullest part of your bust, keeping it parallel to the floor
- Waist: Find your natural waistline (the narrowest point of your torso, usually above the belly button) and measure around it
- Hips: Measure around the fullest part of your hips and seat
Not sure about your proportions? Our Body Shape Calculator can help you figure out your body type in about 30 seconds.
Men's Size Conversion
Most size guides skip men's clothing entirely, which is frustrating if you're an Australian guy ordering from an American brand. Here are the conversions across the main categories.
Men's Shirt Size Conversion
Australian men's shirts are sized by chest measurement in centimeters. US shirts use inches. The numbers look different but the actual sizes line up closely.
| AU (Chest cm) | US | UK | EU |
|---|---|---|---|
| AU 87 | US 34 | UK 34 | EU 44 |
| AU 92 | US 36 | UK 36 | EU 46 |
| AU 97 | US 38 | UK 38 | EU 48 |
| AU 102 | US 40 | UK 40 | EU 50 |
| AU 107 | US 42 | UK 42 | EU 52 |
| AU 112 | US 44 | UK 44 | EU 54 |
Men's Pants Size Conversion
Good news here: Australian and US men's pants both use waist measurements in inches, and the numbers are very close. Most of the time your AU waist size is your US waist size.
| AU Waist | US Waist | EU |
|---|---|---|
| AU 28 | US 28 | EU 44 |
| AU 30 | US 30 | EU 46 |
| AU 32 | US 32 | EU 48 |
| AU 34 | US 34 | EU 50 |
| AU 36 | US 36 | EU 52 |
| AU 38 | US 38 | EU 54 |
Men's Collar Size Conversion
Dress shirt collars are measured in centimeters in Australia and inches in the US. Here is the crossover:
| AU Collar (cm) | US Collar (inches) | UK/EU |
|---|---|---|
| AU 37 | US 14.5 | 37 |
| AU 38 | US 15 | 38 |
| AU 39 | US 15.5 | 39 |
| AU 40 | US 16 | 40 |
| AU 41 | US 16.5 | 41 |
| AU 42 | US 17 | 42 |
Jeans Size Conversion: AU to US
Jeans use waist measurements in inches rather than dress sizes, which throws people off because the numbers don't match. An AU 10 dress is a US 6, but a "size 27" jean is a 27-inch waist in both countries.
| AU Dress Size | US Dress Size | Waist (inches) |
|---|---|---|
| AU 6 | US 2 / 25 | 25" |
| AU 8 | US 4 / 26 | 26" |
| AU 10 | US 6 / 27 | 27" |
| AU 12 | US 8 / 29 | 29" |
| AU 14 | US 10 / 30 | 30" |
| AU 16 | US 12 / 31 | 31" |
| AU 18 | US 14 / 32 | 32" |
Women's Shoe Sizes: AU and US Are the Same
This is the one area where life is simple. Australian and US women's shoe sizes use the same scale. Your AU size is your US size. No math required.
UK shoe sizes, on the other hand, run about 2 sizes smaller. And EU sizes use a completely different numbering system. The table below shows how all four systems line up.
| AU/US Shoe | UK Shoe | EU Shoe |
|---|---|---|
| 5 | 3 | 35-36 |
| 6 | 4 | 36-37 |
| 7 | 5 | 37-38 |
| 8 | 6 | 38-39 |
| 9 | 7 | 39-40 |
| 10 | 8 | 40-41 |
| 11 | 9 | 41-42 |
| 12 | 10 | 42-43 |
Width matters too. If you have wide feet, look for shoes labeled W (wide) or WW (extra wide). Many Australian and US brands carry wide options, but you usually have to filter for them online.
Men's Shoe Sizes: AU to US
Men's shoes are where it gets tricky. Australian men's shoes follow the UK sizing system, which runs one full size smaller than the US system. So if you wear an AU 10, you need a US 11.
One thing to keep in mind: many sneaker brands sold in Australia already use US sizing on the box. Check the label before assuming you need to convert.
| AU/UK Men's | US Men's | EU |
|---|---|---|
| AU 7 | US 8 | EU 40 |
| AU 8 | US 9 | EU 41 |
| AU 9 | US 10 | EU 42 |
| AU 10 | US 11 | EU 44 |
| AU 11 | US 12 | EU 45 |
| AU 12 | US 13 | EU 46 |
| AU 13 | US 14 | EU 47 |
Bra Size Conversion: AU to US
Bra sizing between Australia and the US trips a lot of people up. The cup letters look familiar, but the band numbers are completely different. Australia uses small even numbers (8, 10, 12, 14). The US uses larger even numbers (30, 32, 34, 36).
The conversion is straightforward: add 22 to your AU band size to get the US band size.
AU Band + 22 = US Band
AU 8 → US 30
AU 10 → US 32
AU 12 → US 34
AU 14 → US 36
AU 16 → US 38
AU 18 → US 40
| AU Band | US Band | UK Band | EU Band |
|---|---|---|---|
| AU 8 | US 30 | UK 30 | EU 65 |
| AU 10 | US 32 | UK 32 | EU 70 |
| AU 12 | US 34 | UK 34 | EU 75 |
| AU 14 | US 36 | UK 36 | EU 80 |
| AU 16 | US 38 | UK 38 | EU 85 |
| AU 18 | US 40 | UK 40 | EU 90 |
| AU 20 | US 42 | UK 42 | EU 95 |
Not sure about your bra size? Try our Bra Size Calculator for AU, US, UK, and EU conversions with sister size recommendations.
Brand-Specific Fit Notes
Converting your size is step one. Step two is knowing that brands don't all fit the same, even at the same number. Here is how some of the most popular international brands tend to run.
Zara
Runs small, especially around the shoulders. Consider going one size up from your converted size.
H&M
Tends to run small across most categories. Their "Curve" range fits more generously.
ASOS
Based in the UK, so they use UK sizing. Both AU and UK sizes match, which makes things easy.
Uniqlo
Japanese brand that tends to run small in fitted styles. Relaxed fits are more forgiving.
Mango
European sizing. Runs small overall. Consider one size up from your converted US size.
Target (US)
American Target uses vanity sizing. Sizes run bigger than the numbers suggest.
Old Navy
Generous vanity sizing. Often runs 1-2 sizes larger than standard measurements.
Levi's
Jeans run true to measured waist size. One of the more reliable brands for consistent sizing.
Gap
Generally true to size with a standard American fit. Slim cuts run about one size smaller.
J.Crew
True to size for most styles. Tailored and slim pieces may run slightly fitted.
Shop These Brands in US Sizes
Hand-picked picks from the brands referenced above, in current US sizing. Each one ships internationally and uses the AU→US sizing logic we just walked through.
Affiliate disclosure: As an Amazon Associate, DiscoverFashions earns from qualifying purchases. We only feature products we genuinely believe will help our readers.
Levi's 501 Original Fit Jeans (Women's)
The 501 fits true to measured waist size — one of the most reliable American jeans for AU→US sizing.
Why we picked it: Pick this when the conversion chart says you should size down: 501s actually run as labeled.
Shop on Amazon
Wrangler Worldwide High-Rise Wide-Leg Jeans
A versatile wide-leg silhouette with a high rise that balances proportions across most body shapes.
Why we picked it: Closest Amazon-native equivalent to a Uniqlo U wide-fit; sized to US standards so the AU conversion is straightforward.
Shop on Amazon
Calvin Klein Modern Cotton Bralette
Soft cotton-modal bralette sized XS–XL — easier than dialing in cup letters when shopping across sizing systems.
Why we picked it: Bralette sizing skips the AU/US cup-letter mismatch entirely. Great pick if you sit between bra sizes after converting.
Shop on Amazon
Tommy Hilfiger Women's Crew Neck Short Sleeve Cotton T-Shirt
A classic everyday tee in 100% cotton with a relaxed crew-neck cut that runs true to its US size label.
Why we picked it: Tommy Hilfiger Amazon listings tend to size up generously — if your AU→US conversion puts you between sizes, pick the smaller one here.
Shop on Amazon
Levi's 711 Skinny Jeans (Women's)
Mid-rise skinny with a touch of stretch — the canonical Amazon equivalent if you usually shop Gap True Skinny.
Why we picked it: Gap True Skinny is gap.com-only on Amazon. Levi’s 711 lands in the same fit family and uses consistent US numeric sizing.
Shop on Amazon
Amazon Essentials Skinny Ankle Pant
An ankle-cropped slim trouser — the closest Amazon-native pick to an Old Navy Pixie Pant, with the same office-ready silhouette.
Why we picked it: Sized in US even numbers (XS–XXL also available). Reviewer base is huge, so fit notes are easy to filter by your measurements.
Shop on AmazonUK and EU Size Comparison
Since you are working with Australian sizes already, it helps to know how UK and EU sizes fit into the picture.
UK Sizes
UK sizes and Australian sizes are the same. Both countries adopted British sizing standards, so there is no conversion needed. If a UK retailer says size 12, you wear size 12 in Australia.
Your AU size = Your UK size
EU Sizes
European sizes add 28 to the AU number. So an AU 10 is an EU 38. Another way to think about it: AU minus 4 gives US, then US plus 32 gives EU. Either way you get the same answer.
| AU Size | EU Size |
|---|---|
| AU 6 | EU 34 |
| AU 8 | EU 36 |
| AU 10 | EU 38 |
| AU 12 | EU 40 |
| AU 14 | EU 42 |
| AU 16 | EU 44 |
| AU 18 | EU 46 |
| AU 20 | EU 48 |
International Shopping Tips
Converting your size is only part of the equation. Here are a few things that will save you from a costly return.
1. Always check the brand's own size chart. The conversion formulas in this guide work for standard sizing, but individual brands can vary by a full size or more. Most online stores publish measurement charts; use them.
2. Measure yourself at home. Grab a soft measuring tape and take your bust, waist, and hip measurements. Compare those numbers directly to the brand's chart. This is more accurate than any size number.
3. Check the return policy before ordering. International returns can cost $15-30 AUD for shipping alone. Some stores offer free returns even for international orders. Others do not. Know before you buy.
4. Read reviews that mention fit. Phrases like "runs small" or "size up" in customer reviews are worth more than any conversion chart. Filter reviews by people with similar measurements to yours if the site allows it.
5. Order two sizes when possible. If the store offers free returns domestically (and you have a US forwarding address or friend), ordering two sizes and sending one back can be cheaper than a single wrong order.
Essential Measurement Tools
Two inexpensive tools that make international size conversion far more reliable than guessing by tag number.
Affiliate disclosure: As an Amazon Associate, DiscoverFashions earns from qualifying purchases. We only feature products we genuinely believe will help our readers.
The Fitter Tape — In-Home Bra Size Measuring Tape
A purpose-built tape with band and cup sizing printed directly on it — covers 28AA through 44G in one tool.
Why we picked it: Bra cup letters diverge between AU and US above D. This tape lets you measure once and read the correct US band/cup on the spot.
Shop on Amazon
SINGER Adjustable Dress Form (Sizes 4–10)
A twelve-dial home dress form that dials in to your exact bust, waist, and hip measurements — handy when comparing brand size charts side-by-side.
Why we picked it: If you order across sizing systems often, a dress form pays for itself in saved return shipping. Entry-level model, not industrial.
Shop on AmazonKnow Your Body Shape
Knowing your body shape makes international shopping easier because you will know which cuts and silhouettes suit you, regardless of sizing systems.
Versatile Wardrobe Picks for AU→US Switchers
Forgiving silhouettes that travel well between sizing systems and brand cuts — easier to land the right fit on the first order.
Affiliate disclosure: As an Amazon Associate, DiscoverFashions earns from qualifying purchases. We only feature products we genuinely believe will help our readers.
ANRABESS Open Front Knit Cardigan
An open-front knit that drapes rather than buttons — sizing is generous and forgiving across XS–XXL.
Why we picked it: No closures means no zip or button tension across the bust or hips, which is exactly what you want when AU/US sizing is ambiguous.
Shop on Amazon
State Cashmere Essential V-Neck Pullover Sweater
100% pure cashmere V-neck with a relaxed fit through the body — comfortable across multiple seasons and layering needs.
Why we picked it: Soft hand-feel makes a half-size mismatch invisible. One of the most-reviewed sub-$100 cashmere brands on Amazon US.
Shop on Amazon
Levi's Wedgie Straight Jeans (Women's)
High-rise straight cut with a tailored vintage feel — the Amazon-side pick when you would normally shop Madewell.
Why we picked it: The Wedgie construction shapes and lifts; consistent US sizing makes this one of the easiest jeans to nail on the first order.
Shop on Amazon
Naturalizer Maxwell Ballet Flat (Women’s)
A leather ballet flat with cushioned support — sizing in standard US shoe numbers, identical to Australian women’s shoe sizes.
Why we picked it: Women’s shoe sizes are the one category where AU and US match exactly. This is the safest cross-system shoe order you can make.
Shop on AmazonFrequently Asked Questions
What is Australian size 10 in US sizes?
Australian size 10 equals US size 6. Subtract 4 from your Australian size to get your US size. This works for most women's clothing including dresses, tops, and skirts.
What is Australian size 12 in US sizes?
Australian size 12 equals US size 8. The formula is AU minus 4, so AU 12 minus 4 equals US 8. This conversion applies to standard women's ready-to-wear clothing.
Why are Australian sizes different from US sizes?
Australia adopted British sizing standards, which use higher numbers than the American system. Both systems describe the same body measurements with different labels. An AU 14 and a US 10 fit the same body, they just use different number scales.
Do all brands follow the same size conversion?
No. Brands vary due to vanity sizing, different target markets, and pattern-making choices. A US size 6 at Old Navy fits bigger than a US size 6 at Zara. Always check the brand's own measurement chart when you can.
Are Australian and UK sizes the same?
Yes. Australian and UK clothing sizes are identical because both countries adopted British sizing standards. Your AU size equals your UK size for all clothing categories. Shopping from UK retailers requires no conversion at all.
Are Australian and US women's shoe sizes the same?
Yes, for women. Australian and US women's shoe sizes use the same scale, so an AU women's 8 is a US women's 8. Men's shoes are different though. Australian men's shoes follow UK sizing, which runs one size smaller than US. An AU men's 9 equals a US men's 10.
How do I convert Australian bra sizes to US?
Add 22 to the AU band number to get the US band size. AU 10 equals US 32, AU 12 equals US 34, AU 14 equals US 36. Cup sizes A through D are the same in both systems. Above D, AU uses UK lettering (DD, E, F) while US uses DDD, DDDD.
Can I use my measurements to find my size internationally?
Yes. Body measurements in centimeters or inches work regardless of country. Measure your bust, waist, and hips, then compare to the brand's size chart. This is the most reliable method when shopping across different sizing systems.
What if I'm between sizes?
Consider the fabric and cut. Stretch materials like jersey or denim with elastane can work in the smaller size. Structured fabrics like cotton poplin or wool suiting usually need the larger size. When in doubt, size up and tailor down.
What size am I in US from Australia?
For women's clothing, subtract 4 from your AU size (AU 10 = US 6). For women's shoes, the sizes are identical (AU 8 = US 8). For bras, add 22 to the band (AU 12 = US 34). For men's shirts, AU and US sizes are similar. For men's shoes, add 1 to your AU size.
Instant Size Conversion
Use our Size Converter for instant conversions between AU, US, UK, and EU sizes across all clothing categories.