Australian men’s shoe sizes match UK sizes, so a US 9 is an AU 8.5.
US sizes run about one full number higher than AU sizes.
Always check the brand’s own chart since AU sizing can vary slightly by manufacturer.
Measuring your foot in centimeters is the most reliable way to confirm your true AU size.
What Is a US to Australian Shoe Size Conversion?
A US to Australian shoe size conversion tells you which AU number matches your US shoe size, since the two countries use different sizing scales. Australia follows the same sizing system as the UK for men’s footwear, so once you know the UK equivalent, you already know your AU size.
In our experience fitting thousands of men’s shoes, this is one of the questions we hear most from shoppers ordering from Australian retailers or planning a trip down under. A US 10 is not an AU 10, and assuming the numbers match is the quickest way to end up with the wrong pair.
Here’s the short version: subtract roughly one size from your US number to estimate your Australian size. Below you’ll find the full chart along with a simple way to confirm your true size before you buy.
US to Australian Shoe Size Conversion Chart
What size is a US 9 in Australia? A US men’s size 9 converts to an AU size 8.5. This table shows the full range from US 6 to US 15, along with the matching UK, EU, and centimeter measurements so you can double-check against a real foot measurement.
US Size
AU / UK Size
EU Size
Foot Length (cm)
6
5.5
39
24.1
6.5
6
39.5
24.4
7
6.5
40
24.8
7.5
7
40.5
25.1
8
7.5
41
25.4
8.5
8
42
25.7
9
8.5
42.5
26.0
9.5
9
43
26.7
10
9.5
44
27.3
10.5
10
44.5
27.9
11
10.5
45
28.3
11.5
11
45.5
28.6
12
11.5
46
29.4
13
12.5
47
30.2
14
13.5
48
31.0
15
14.5
49
32.0
Australian men’s sizing runs on the same scale as UK sizing across nearly all mainstream brands. A small number of Australian-made work boot brands size slightly differently, so it’s worth checking the product page when in doubt.
Drag the slider or toggle units to find your AU, UK, and EU size instantly.
YOUR AU SIZE
5.5
US
AU / UK
EU
Length (cm)
💡 Tip: AU sizes match UK sizes exactly for men’s footwear, no extra adjustment needed.
👟 Did You Know?
Australia never developed its own independent shoe sizing standard. When British sizing spread through the Commonwealth, Australian retailers adopted it directly, which is why AU and UK men's sizes have stayed identical ever since.
How to Convert US to Australian Sizes
What is the difference between US and Australian men's shoe sizes? Australian sizes typically run half a size to one full size smaller than US sizes for the same foot length. A US 10 is an AU 9.5, and a US 12 is an AU 11.5.
The simplest rule of thumb: subtract 0.5 from your US size to estimate your AU size. It works well as a quick shortcut, though it's still worth checking a brand's specific chart before ordering.
US 8 → AU 7.5
US 9 → AU 8.5
US 10 → AU 9.5
US 11 → AU 10.5
US 12 → AU 11.5
Is Australian Sizing the Same as UK Sizing?
Yes, for men's shoes, Australian sizing is the same as UK sizing. If a product listing shows a UK size but not an AU size, you can use that UK number directly as your Australian size with no adjustment needed.
This overlap doesn't extend to every category. Women's and children's sizing can show small regional differences between AU and UK charts, so this direct match applies specifically to men's footwear. For the full breakdown across US, UK, and EU scales, see our US vs UK vs Euro shoe size conversion guide.
💡 Expert Tip
When a size falls between two numbers, size up rather than down. A slightly roomier fit is easy to adjust with a thicker sock or insole, while a shoe that's too tight causes discomfort no matter what you do afterward.
How to Measure Your Foot for Accurate Sizing
How do you measure your foot for Australian shoe sizing? Stand on a sheet of paper, trace your foot outline, then measure the longest point from heel to toe in centimeters. Match that number against the chart above to find your true AU size.
Place a sheet of paper on a hard floor against a wall.
Stand on the paper with your heel touching the wall, wearing the socks you'd normally wear with shoes.
Mark the tip of your longest toe on the paper.
Measure the distance from the wall edge to the mark in centimeters.
Repeat for the other foot, since one is often slightly larger.
Use the larger measurement and match it against the chart.
We've seen many shoppers skip this step because they already "know" their size from a local brand. That size doesn't always carry over to an Australian retailer with a different last shape. Measuring once removes the guesswork for every future order.
📏 Quick Reference
Best measuring time: Evening, when feet are slightly swollen from the day
What to wear: The socks you'd normally pair with the shoe
Ideal toe space: About a thumb's width between your longest toe and the shoe's front
Signs You're Wearing the Wrong Shoe Size
Signs Your Shoes Are Too Small
Toes feel cramped or curl slightly inside the shoe
Pressure or redness across the widest part of the foot
Blisters forming at the back of the heel or sides of the toes
Numbness or tingling after an hour or more of wear
Signs Your Shoes Are Too Big
Your heel lifts noticeably out of the shoe with each step
Your foot slides forward when walking downhill
You need an extra pair of socks just to keep the shoe snug
Laces need to be pulled unusually tight to hold your foot in place
Why Australian and US Sizes Don't Match
Why don't US and Australian shoe sizes line up? The two countries built their sizing systems around different measurement traditions. US sizing grew out of the Brannock device system, while Australian sizing inherited the British barleycorn system, a historical unit equal to one third of an inch.
One common issue we notice is shoppers assuming a size that fits well in a US store will fit identically in an Australian-made shoe. Even with matching numbers, the last, which is the foot-shaped mold used in manufacturing, can differ slightly between brands and change how a size actually feels.
⚠ Common Mistake
Ordering an AU size that matches your US number is one of the most frequent mistakes we see. A US 10 ordered as an AU 10 will almost always run too big. Always convert first, then check the specific brand's chart if one is provided.
Buying Guide: What to Check Before You Order from Australia
What should you check before buying shoes from an Australian retailer? Look at four things: the brand's own size chart, width options, the return policy for international orders, and reviews mentioning fit.
Brand-specific chart: Many Australian retailers publish their own conversion table alongside the general standard.
Width options: Look for D, EE, or narrow labels if you know you run wide or narrow, since length alone won't fix a width issue.
Return policy: Confirm the return window and who covers international shipping costs before ordering.
Fit reviews: Search reviews for phrases like "runs small" or "true to size" to catch patterns other buyers have already found.
Common Mistakes When Converting AU Sizes
After years in footwear, we consistently see the same handful of errors trip people up:
Assuming AU sizing matches US sizing instead of UK sizing.
Rounding down instead of up when a foot measurement falls between two sizes.
Ignoring width entirely and only converting length.
Trusting an old measurement instead of remeasuring before a new purchase.
Skipping the retailer's specific chart because the general conversion "should be close enough."
Expert Tips for Ordering Australian Shoes
✅ Shopper Checklist
Measure both feet and use the larger measurement.
Treat your AU size as equal to your UK size, not your US size.
Check the brand's own size chart before converting manually.
Look for width sizing if you know you run wide or narrow.
Confirm the return window before you buy.
After 25 years in footwear, our top recommendation is simple: never assume a number carries over between countries. A five-minute measurement is far cheaper than an international return shipment.
Frequently Asked Questions
What is a US size 9 in Australian shoe size? A US men's size 9 converts to an AU size 8.5. The general rule is to subtract half a size when converting from US to AU.
Is Australian shoe size the same as UK shoe size? Yes, for men's footwear, Australian and UK sizes are identical. You can use a UK size chart directly if an AU chart isn't available.
What is a US size 10 in Australian sizing? A US men's size 10 is an AU size 9.5. As a shortcut, subtracting 0.5 from your US size gets you close to the AU equivalent.
Do all Australian brands use the same size chart? Most mainstream brands follow the standard AU/UK scale, but some work boot and outdoor brands size slightly differently, so it's worth checking the specific product page.
Should I size up if I'm between two sizes? Yes, in most cases. A slightly larger shoe is easier to adjust with socks or insoles than a shoe that's genuinely too small.
Do wide feet need a different AU size number? Not usually a different length size, but you should look for width options like D (standard) or EE (wide) alongside your regular length size.
How do I know my AU size without ordering from Australia before? Measure your foot length in centimeters at home, then match that number against the chart above. This works whether you've ordered from Australia before or not.
Are Australian shoe sizes different for boots versus sneakers? Not by design, though boots are sometimes cut slightly roomier to accommodate thicker socks, so check the product description for any fit notes.
Can my shoe size change over time? Yes. Weight changes, aging, and long periods of standing can all cause small shifts in foot length and width, which is why remeasuring before a new purchase is worth the extra few minutes.
What's the fastest way to check my AU size while shopping? Measure your foot length once in centimeters, then keep that number handy. You can match it against any US, UK, EU, or AU chart any time you shop.
Final Thoughts
Your true Australian shoe size is the one that matches your actual foot length, not a number carried over from a US size. Since AU sizing mirrors UK sizing, converting takes just a moment once you know your measurement.
Take five minutes to measure your foot today, then use the chart above the next time you shop from an Australian retailer. For more sizing tools, check out our full men's shoe size chart.
At Urban Style Footwear, we have over 20 years of experience in the footwear business here in las vegas & Chennai. Along with my team, I’ve personally worked with thousands of customers, helping them choose the right footwear based on comfort, durability, proper fit, and budget.
I’m Abdul, and I’ve been directly involved in the day-to-day operations of the store, from selecting products to assisting customers in finding what suits them best. Over the years, I’ve seen common problems people face, like wrong sizing, uncomfortable materials, or shoes that don’t last, and that’s exactly what we try to solve.
Whether it’s school shoes for daily use, comfortable walking footwear, or durable slippers, our recommendations come from real in-store experience and customer feedback, not just online research or trends.
Through this blog, we share practical buying guides, honest comparisons, and simple advice to help you avoid mistakes and choose footwear that actually works for your needs.
Our goal is simple, to help you find comfortable, high-quality footwear while making better decisions for your foot health and long-term use.
👉 Everything we recommend is based on real customer interactions and products we deal with daily in our stores.
