Verified brand-to-brand conversion

Nike vs ASICS shoe sizing

A Nike US 10 is about an ASICS US 9 (EU 42.5) in men's sizes. ASICS fits about a full size bigger at the same printed size, so expect to take about a full size down in ASICS, based on both brands' official size charts.

Matched by foot length from both brands' published size charts · Updated July 2026

Convert your exact size All 450+ brands

Convert your Nike size to ASICS

Loading sizes…

Nike to ASICS size chart

Each row matches by foot length, the key both brands print their charts in. Sizes outside either brand's published range are not shown.

Men's

Men's: Nike to ASICS shoe size conversion with foot length
Nike US	Foot (cm)	ASICS US	ASICS EU
5	22.9	4.5	37
5.5	23.3	5	37.5
6	23.7	5	37.5
6.5	24.1	5.5	38
7	24.5	6	39
7.5	25.0	6.5	39.5
8	25.4	7.5	40.5
8.5	25.8	8	41.5
9	26.2	8	41.5
9.5	26.7	8.5	42
10	27.1	9	42.5
10.5	27.5	9.5	43.5
11	27.9	10	44
11.5	28.3	10.5	44.5
12	28.8	11.5	46
12.5	29.2	11.5	46
13	29.6	12	46.5
13.5	30.0	12.5	47
14	30.5	13	48
14.5	30.9	14	49
15	31.3	14	49
15.5	31.7	15	50.5

Women's

Women's: Nike to ASICS shoe size conversion with foot length
Nike US	Foot (cm)	ASICS US	ASICS EU
5	22.1	5	35.5
5.5	22.4	5.5	36
6	22.9	6	37
6.5	23.3	6.5	37.5
7	23.7	6.5	37.5
7.5	24.1	7	38
8	24.6	7.5	39
8.5	24.9	8	39.5
9	25.4	9	40.5
9.5	25.9	9.5	41.5
10	26.2	9.5	41.5
10.5	26.7	10	42
11	27.1	10.5	42.5
11.5	27.5	11	43.5
12	27.9	11.5	44

Fit varies by model

Nike

Of 210 tracked Nike models, 27 run large. The rest fit true to the chart. The table above is the brand's standard chart, so check the model before sizing.

Nike vs ASICS: common questions

Does ASICS run bigger or smaller than Nike?

ASICS runs about a full size bigger than Nike: the same foot takes a lower number in ASICS, consistently across the size range. For example, a Nike US 10 maps to an ASICS US 9.

Can I buy ASICS in my Nike size?

No. The number on the box means a different foot length in each brand, which is why a straight size-for-size swap misfits. Use the table above or the converter to translate properly.

How do I convert my Nike size to ASICS?

Find your Nike size in the table above and read across, or use the converter with your exact size. The most reliable method is your measured foot length in centimeters: both brands publish their charts against it, so it translates without guesswork. Half sizes round to the nearest size the brand actually makes.

More brand conversions

Nike → Adidas Adidas → Nike Nike → New Balance New Balance → Nike Nike → Converse Converse → Nike Nike → Vans Vans → Nike Nike → Puma Puma → Nike

Brand size charts: Nike size chart

Own a shoe store or brand?

Put this recommender on your own site. Shoppers name a pair they own and get their size in your brand. One script tag, works on Shopify, WooCommerce and any platform.

Explore Fit Finder