Nano X Size Guide: Fit, Width & Size Chart

Runs true to size

The Reebok Nano X true to size. Start by checking your usual US size. Available in standard (D) width only. Use the table below to convert your foot length in millimetres straight to US, UK, EU and CM sizes — the one measurement every system agrees on.

Best fit recommendation for Reebok Nano X

For a 272 mm foot, Reebok Nano X fits true to size. Best fit: US 10 (likely US 9–11), UK 9, EU 41, 27 cm — confidence 50%.

Recommended size for a 272 mm foot on Reebok Nano X (best fit + range, not a guarantee)
Best fit Likely range UK EU CM Confidence
US 10 US 9–11 9 41 27 50%

Evidence: 1 sources · no lab measurement in this record

See how we calculate for the methodology. Sizes vary by model and foot shape; this is an estimate, not a guarantee.

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Does the Nano X run true to size?

Across our data the Reebok Nano X true to size. Start by checking your usual US size.

Nano X size conversion chart

Nano X sizes by foot length. US Men's, US Women's, UK, EU and CM. The highlighted row is the model's true-to-size anchor.
Foot length US Men US Women UK EU CM
250.9mm 7.5 9 6.5 38 25
255.1mm 8 9.5 7 38 25.5
259.3mm 8.5 10 7.5 39 26
263.5mm 9 10.5 8 40 26.5
267.8mm 9.5 11 8.5 40 27
272mm 10 11.5 9 41 27
276.2mm 10.5 12 9.5 41 27.5
280.5mm 11 12.5 10 42 28
284.7mm 11.5 13 10.5 43 28.5
288.9mm 12 13.5 11 43 29
293.2mm 12.5 14 11.5 44 29.5

EU sizes are always rounded to a whole size — treat the EU column as the closest honest match.

Nano X width availability

Available in standard (D) width only.

Only the standard (D) width is offered, so very wide or very narrow feet may need to adjust length or choose a brand with more width grades.

Expert fit notes

CrossFit training shoe true to size with secure midfoot lockdown. Slightly narrow toe box — wide feet try half up.

Where this data comes from

Built from 1 source and 888 measurements. See how we calculate for how confidence is scored.