Extr4 Size Guide
Extr4 comes up large, so size down one. If you are a UK 9 in most shoes, order the UK 8. This guide gives the EU to UK conversion and covers what to do if you are caught between sizes. Everything we carry from Extr4 is footwear.
Does Extr4 Run Big or Small?
Extr4 runs big. Size down one. Every Extr4 product at Union 22 carries the Big Fit indicator and it applies across the range.
This is the standard position for Italian-made footwear and Extr4 is no exception. If you have bought Italian trainers before you will already expect it. If Extr4 is your first pair, take the instruction as written rather than splitting the difference.
The Union 22 Fit System
Every product page at Union 22 carries one of three fit indicators. It is an instruction about sizing, not a description of the style:
Extr4 Size Conversion: EU to UK
Every pair at Union 22 is listed with both EU and UK, for example EU 42 / 8 UK. Apply the size down after you convert, not before. Find your usual UK size, then take the next size down.
| EU | UK |
|---|---|
| EU 40 | UK 6 |
| EU 41 | UK 7 |
| EU 42 | UK 8 |
| EU 43 | UK 9 |
Whole sizes only - there is no half size to fall back on. The run is a narrow one, so the size selector on each product shows exactly what we hold in that pair.
What To Do If You Are Between Extr4 Sizes
Go down. There is no half size to take and the shoe already runs large, so the smaller of the two is the right call. A trainer that is too big will slip at the heel however tightly you lace it.
If you are genuinely unsure, message us before ordering rather than after. On a short size run the pair you want may not come back if it goes.
Still Not Sure? Ask Us.
A shoe is the worst thing to get wrong by post. Tell us what you normally wear and we will tell you what to order. Every message comes straight through to Dale or a member of the team personally. No bots, no automated replies.
We also offer free personal shopping sessions in store at Union House, Liverpool, where you can try both sizes on rather than guessing.
About Extr4 at Union 22
Extr4 is Italian-made footwear and we carry it as footwear only, including the U-KAIZEN GTX. Every pair is listed with both EU and UK sizes and the Big Fit indicator on the page, so the sizing answer is there before you need this guide.
Shop all Extr4 at Union 22 →