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Nike Footwear Size Guide
The Nike combat-sports footwear range — HyperKO, HyperKO 2, HyperKO 2 SE, Machomai 2, Machomai 3, Speedsweep, Tawa, Fury, Hypersweep and Inflict — is built on a deliberately narrow last for ring agility and pivot grip. That narrow profile, combined with Nike's tendency to run half a size short of the marked UK size, is why our customers consistently fit better when they order half a size up from their usual everyday shoe.
Fit tip: Order half a size up from your normal size. This is Athlete Performance Solutions' official Fit Tip (Nike's authorised combat-sports licensee) and it matches the feedback we hear from Bytomic customers. If you have wider feet or you plan to wear a thicker training sock, consider a full size up.
The UK and US Men's sizes shown on each Nike product page follow the conversion in the table below. US Women's sizing runs 1.5 sizes higher than US Men's for the same shoe (i.e. a Men's US 8 is a Women's US 9.5).
| UK Size | US Men's | US Women's |
|---|---|---|
| UK 3 | US 4 | US 5.5 |
| UK 3.5 | US 4.5 | US 6 |
| UK 4 | US 5 | US 6.5 |
| UK 4.5 | US 5.5 | US 7 |
| UK 5 | US 6 | US 7.5 |
| UK 5.5 | US 6.5 | US 8 |
| UK 6 | US 7 | US 8.5 |
| UK 6.5 | US 7.5 | US 9 |
| UK 7 | US 8 | US 9.5 |
| UK 7.5 | US 8.5 | US 10 |
| UK 8 | US 9 | US 10.5 |
| UK 8.5 | US 9.5 | US 11 |
| UK 9 | US 10 | US 11.5 |
| UK 9.5 | US 10.5 | US 12 |
| UK 10 | US 11 | US 12.5 |
| UK 10.5 | US 11.5 | US 13 |
| UK 11 | US 12 | US 13.5 |
| UK 11.5 | US 12.5 | US 14 |
| UK 12 | US 13 | US 14.5 |
| UK 13 | US 14 | US 15.5 |
For full EU sizing and foot-length references, see the Nike size chart below.
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