Clothing and shoe size converter for AU, UK, US, CA and EU
Find your best clothing and shoe size match before you buy. SizeSwapper compares official brand size guides, AU, UK, US, CA and EU sizing, and your own measurements — the strongest fit guidance available, short of trying it on. Get a confidence rating and between-size advice, so you shop faster with less guesswork and fewer wrong-size returns.
Popular examples- AU 12 → US 8
- Zara M → ASOS 10
- EU 39 → US 8
- Between sizes? We guide you to tighter or roomier fits
Allbirds size charts & fit guide
Women shoes
| Brand size | AU | UK | US | EU | Foot (cm) | Waist (cm) |
|---|---|---|---|---|---|---|
| US 5 | - | 2 | 5 | 35 | 22 | - |
| US 6 | - | 3 | 6 | 36 | 23 | - |
| US 7 | - | 4 | 7 | 37 | 24 | - |
| US 8 | - | 5 | 8 | 38 | 25 | - |
| US 9 | - | 6 | 9 | 39 | 26 | - |
| US 10 | - | 7 | 10 | 40 | 27 | - |
| US 11 | - | 8 | 11 | 41 | 28 | - |
Men shoes
| Brand size | AU | UK | US | EU | Foot (cm) | Waist (cm) |
|---|---|---|---|---|---|---|
| US 8 | - | 7 | 8 | 41 | 26 | - |
| US 9 | - | 8 | 9 | 42 | 27 | - |
| US 10 | - | 9 | 10 | 43 | 28 | - |
| US 11 | - | 10 | 11 | 44 | 29 | - |
| US 12 | - | 11 | 12 | 45 | 30 | - |
Source: official size guide. Last checked: 2026-06-25.
Allbirds sizing FAQs
How accurate is the Allbirds size conversion on SizeSwapper?
Allbirds sizes consistently across its range, so a SizeSwapper conversion is a reliable starting point.
Which Allbirds sizes does SizeSwapper cover?
SizeSwapper covers Allbirds's women's and men's shoes sizing across the UK, the US, the EU. If you need a category or region that isn't listed yet, you can request it directly from the converter.
Can I convert my size from another brand to Allbirds?
Yes. Choose "Brand & size" mode, select the brand and size you already know fits, then choose Allbirds as your target brand to see the closest match.
Do I need to know my measurements to convert to Allbirds?
No. If you already know your size in another brand, SizeSwapper converts directly between brands without needing your measurements. If you'd rather enter your measurements directly, switch to "Measurements" mode instead.
When was Allbirds's size data last checked?
Allbirds's size chart was last checked on 25 June 2026, against its own official size guide. The source link is shown below the size tables on this page.