TrueToSize

Convert / Shoes

On to Nike shoe size

The short answer

On 8.5 is Nike 8.5 by the two brands' own charts. 0 of 14 On sizes land on a different label at Nike.

Both brands publish the foot length each size is built for, so every row matches a foot, not a label.

Every On size read across to Nike. US women's sizes on the left, US women's on the right.
OnOn builds it forNike, by chartSame labelNike builds it forNike also prints
5foot length 22 cm55foot length 22 cmUS men's 3.5 · UK 2.5 · EU 35.5
5.5foot length 22.5 cm5.55.5foot length 22.5 cmUS men's 4 · UK 3 · EU 36
6foot length 23 cm66foot length 23 cmUS men's 4.5 · UK 3.5 · EU 36.5
6.5foot length 23.5 cm6.56.5foot length 23.5 cmUS men's 5 · UK 4 · EU 37.5
7foot length 24 cm77foot length 24 cmUS men's 5.5 · UK 4.5 · EU 38
7.5foot length 24.5 cm7.57.5foot length 24.5 cmUS men's 6 · UK 5 · EU 38.5
8foot length 25 cm88foot length 25 cmUS men's 6.5 · UK 5.5 · EU 39
8.5foot length 25.5 cm8.58.5foot length 25.5 cmUS men's 7 · UK 6 · EU 40
9foot length 26 cm99foot length 26 cmUS men's 7.5 · UK 6.5 · EU 40.5
9.5foot length 26.5 cm9.59.5foot length 26.5 cmUS men's 8 · UK 7 · EU 41
10foot length 27 cm1010foot length 27 cmUS men's 8.5 · UK 7.5 · EU 42
10.5foot length 27.5 cm10.510.5foot length 27.5 cmUS men's 9 · UK 8 · EU 42.5
11foot length 28 cm1111foot length 28 cmUS men's 9.5 · UK 8.5 · EU 43
12foot length 29 cm1212foot length 29 cmUS men's 10.5 · UK 9.5 · EU 44.5
Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.

Open in the converterAdd an item you own

Sources

Nike to On