Short answer: most X9X sneakers are made to fit true to size — order the size you normally wear. Every size on our product pages shows the EU, UK and US size together (for example EU 44 - UK 9 - US 10), so you can pick the system you know.
X9X sneaker size chart (EU, UK, US)
This is the conversion used across our X9X sneakers:
| EU | UK | US |
|---|---|---|
| 35 | 3 | 4 |
| 36 | 4 | 5 |
| 37 | 4.5 | 5.5 |
| 38 | 5 | 6 |
| 39 | 6 | 7 |
| 40 | 6.5 | 7.5 |
| 41 | 7 | 8 |
| 41.5 | 7.5 | 8.5 |
| 42 | 8 | 9 |
| 43 | 8.5 | 9.5 |
| 44 | 9 | 10 |
| 44.5 | 9.5 | 10.5 |
| 45 | 10 | 11 |
| 45.5 | 10.5 | 11.5 |
| 46 | 11 | 12 |
| 47 | 12 | 13 |
| 48 | 13 | 14 |
| 49 | 14 | 15 |
| 50 | 15 | 16 |
Not every style comes in every size. Most run from EU 38 to EU 46/47; a few start at EU 35–36, and some go up to EU 48. Our chunky AETHON 'Labyrinth' and AETHON V2 go all the way to EU 50 (UK 15, US 16). The sizes in stock are always shown on each product page.
Half sizes
Many X9X styles also come in EU 41.5 (UK 7.5), EU 44.5 (UK 9.5) and EU 45.5 (UK 10.5). If you usually wear a half size and the style you like offers it, choose it.
Our tip: choose by your EU size
UK and US conversions can vary slightly between footwear types, but the EU size is the reference for each pair. If you know your EU size from another sneaker you wear comfortably, use that.
If you are between sizes
- Between two sizes, or wide feet: go up to the next half size (or the next full size if no half size is offered).
- Sock-style knit uppers are designed to hug the foot. If you prefer a roomier feel, the next half size up is a good choice.
- Thick socks in winter: consider going half a size up.
Moon boot sizing is different
Our X9X moon boots use their own conversion, so the UK/US numbers differ from the sneaker chart above. For example, EU 39 is UK 5.5 / US 6 in moon boots, but UK 6 / US 7 in sneakers. Moon boots run from EU 38 to EU 45:
| EU | UK | US |
|---|---|---|
| 38 | 5 | 5.5 |
| 39 | 5.5 | 6 |
| 40 | 6.5 | 7 |
| 41 | 7 | 7.5 |
| 42 | 8 | 8.5 |
| 43 | 9 | 9.5 |
| 44 | 9.5 | 10 |
| 45 | 10 | 11 |
Each moon boot size also shows a foot length in centimetres on the product page — compare it with your own foot measurement (below) for the best fit. If you plan to wear thick winter socks, choose the size whose foot length is a little longer than your foot.
How to measure your foot
- Measure in the evening, when your feet are at their largest, wearing the socks you normally wear.
- Stand on a sheet of paper with your heel against a wall.
- Mark the tip of your longest toe, then measure from the wall to the mark in centimetres.
- Measure both feet and use the longer one.
Still unsure?
Message us before you order and we will help you choose: help@mensluxuryboutique.com or WhatsApp +44 7477 396335. Tell us the style, your usual size in another brand and whether your feet are narrow or wide.
FAQs
Do X9X sneakers run small or big?
Most X9X sneakers are made to fit true to size, so order your usual size. If you are between sizes or have wide feet, go up half a size.
Which size system should I use?
Every size shows EU, UK and US together. We recommend choosing by your EU size, as it is the reference for each pair.
Do you have half sizes?
Many styles come in EU 41.5, 44.5 and 45.5 (UK 7.5, 9.5 and 10.5). Available sizes are shown on each product page.
What is the largest size?
Most styles go up to EU 46–47; some go to EU 48, and the AETHON chunky sneakers go up to EU 50 (UK 15, US 16).
Do moon boots fit the same as sneakers?
No — moon boots use their own UK/US conversion. Choose by EU size and check the foot length in centimetres shown for each size.