Nike vs Adidas Sizing: Measurement-Based Comparison

Nike and Adidas don’t always use equivalent size labels or measurements. This comparison uses available brand measurement data to identify where one brand appears roomier than the other. Results are shown separately by gender and category, since the relationship between the two brands can differ between tops and bottoms.

Quick summary

Nike vs Adidas sizing varies by category.

Women: Footwear and tops line up closely, with moderate evidence, while bottoms have limited evidence.

Men: Footwear and bottoms line up closely, while tops have limited evidence. Footwear has the strongest evidence.

These results apply to the categories shown here, not necessarily to other clothing types.

“Evidence” here means how many sizes were compared and how consistently they agreed, not a guess. See the category breakdown below for the specific findings.

Current coverage

This comparison currently includes women's footwear, men's footwear, women's tops, men's tops, women's bottoms, and men's bottoms.

Footwear
Tops
Bottoms

At a glance

Category	Result	Evidence
Women's footwear	Sizes line up closely	Moderate evidence
Men's footwear	Sizes line up closely	Strong evidence
Women's tops	Sizes line up closely	Moderate evidence
Men's tops	No clear pattern	Limited evidence
Women's bottoms	No clear pattern	Limited evidence
Men's bottoms	Sizes line up closely	Moderate evidence

Find your size

The summary above and the category breakdown below give the overall pattern; the converter gives you a category-specific size recommendation.

Find your Adidas size

Choose your gender, category, and Nike size in the converter.

Find my Adidas size →

Category breakdown

Women

Women's Footwear

Moderate evidence

Adidas and Nike sizes line up closely in 22 of 25 comparable women's footwear sizes, 1 favoring Adidas and 2 favoring Nike.

Average difference: +0.4 mm

Closest foot length measurement match: Nike 7.5 → Adidas 7.5

View measurement evidence

Consistency: 22 of 25 sizes are neutral matches · 1 favor Adidas · 2 favor Nike

Measurement used: Foot length

Women's Tops

Moderate evidence

Adidas and Nike sizes line up closely in 4 of 8 comparable women's tops sizes, 3 favoring Adidas and 1 favoring Nike.

Average difference: +1.1 cm

Closest chest measurement match: Nike L → Adidas XL (16-18)

View measurement evidence

Consistency: 4 of 8 sizes are neutral matches · 3 favor Adidas · 1 favor Nike

Measurement used: Chest

Women's Bottoms

Limited evidence

Available measurements don’t show a reliable direction.

4 sizes compared

Closest available waist match: Nike S → Adidas S (4-6)

View measurement evidence

Average difference: Nike +0.8 cm waist

Consistency: 2 of 4 sizes are neutral matches · 1 favor Adidas · 1 favor Nike

Measurement used: Waist

Men

Men's Footwear

Strong evidence

Adidas and Nike sizes line up closely in 28 of 34 comparable men's footwear sizes, 4 favoring Adidas and 2 favoring Nike.

Average difference: +0.8 mm

Closest foot length measurement match: Nike 6.5 → Adidas 6.5

View measurement evidence

Consistency: 28 of 34 sizes are neutral matches · 4 favor Adidas · 2 favor Nike

Measurement used: Foot length

Men's Tops

Limited evidence

Available measurements don’t show a reliable direction.

5 sizes compared

Closest available chest match: Nike S Tall → Adidas M

View measurement evidence

Average difference: Adidas +3.7 cm chest

Consistency: 4 of 5 sizes favor Adidas · 1 neutral

Measurement used: Chest

Men's Bottoms

Moderate evidence

Adidas and Nike sizes line up closely in 8 of 9 comparable men's bottoms sizes, 1 favoring Adidas.

Average difference: +0.1 cm

Closest waist measurement match: Nike M Tall → Adidas M

View measurement evidence

Consistency: 8 of 9 sizes are neutral matches · 1 favor Adidas

Measurement used: Waist

How this comparison works

We compare the brands’ published size-chart measurements within the same clothing category. Small differences within a normal measurement tolerance are treated as effectively equal. Evidence strength depends on how many comparable sizes are available and how consistently the results point in the same direction. Closest measurement matches show the nearest chart values, not a guaranteed fit.

Bottom line

Women: Footwear and tops line up closely, while bottoms have less conclusive evidence.

Men: Footwear and bottoms line up closely, while tops have less conclusive evidence.

Use the converter for a category-specific recommendation.

Related size converters

Women's Tops · Women's Bottoms · Women's Footwear · Men's Footwear

Check the original size charts

Want to inspect the source measurements yourself? View the available Nike and Adidas size-chart data before using the converter.

Measurement data source: brand size-chart data available on October 19, 2025.

FAQ

Can I compare Nike and Adidas directly?

Yes. This page compares Nike and Adidas by gender and category using available size-chart measurements. The comparison explains the broader pattern, while the converter gives you a category-specific Adidas size recommendation based on your Nike size.

Does Adidas run bigger than Nike?

It varies by category.

Women: Footwear and tops line up closely, with moderate evidence, while bottoms have limited evidence.

Men: Footwear and bottoms line up closely, while tops have limited evidence. Footwear has the strongest evidence.

Is the same size equivalent across Nike and Adidas?

Not necessarily. Matching size labels can represent different measurements between brands. Check the relevant category comparison above, or use the converter for a size-specific match.