H&M vs Under Armour Sizing: Measurement-Based Comparison

H&M and Under Armour 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

H&M vs Under Armour sizing varies by category.

Women: Tops, bottoms, and footwear line up closely. Footwear has the strongest evidence.

Men: Tops and footwear line up closely, while bottoms 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 tops, men's tops, women's bottoms, men's bottoms, women's footwear, and men's footwear.

Tops
Bottoms
Footwear

At a glance

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

Choose your gender, category, and H&M size in the converter.

Find my Under Armour size →

Category breakdown

Women

Women's Tops

Moderate evidence

Under Armour and H&M sizes line up closely in 4 of 7 comparable women's tops sizes, 3 favoring Under Armour.

Average difference: +1.3 cm

Closest chest measurement match: H&M M (8–10) → Under Armour MD

View measurement evidence

Consistency: 4 of 7 sizes are neutral matches · 3 favor Under Armour

Measurement used: Chest

Women's Bottoms

Moderate evidence

Under Armour and H&M sizes line up closely in 3 of 5 comparable women's bottoms sizes, 2 favoring Under Armour.

Average difference: +0.8 cm

Closest waist measurement match: H&M S (4–6) → Under Armour SM

View measurement evidence

Consistency: 3 of 5 sizes are neutral matches · 2 favor Under Armour

Measurement used: Waist

Women's Footwear

Strong evidence

Under Armour and H&M sizes line up closely in 8 of 8 comparable women's footwear sizes.

Average difference: +0.6 mm

Closest foot length measurement match: H&M 8 → Under Armour 8.5

View measurement evidence

Consistency: 8 of 8 sizes are neutral matches

Measurement used: Foot length

Men

Men's Tops

Moderate evidence

Under Armour and H&M sizes line up closely in 3 of 6 comparable men's tops sizes, 3 favoring Under Armour.

Average difference: +1.9 cm

Closest chest measurement match: H&M L (42R–44R) → Under Armour LG

View measurement evidence

Consistency: 3 of 6 sizes are neutral matches · 3 favor Under Armour

Measurement used: Chest

Men's Bottoms

Limited evidence

Available measurements don’t show a reliable direction.

3 sizes compared

Closest available waist match: H&M M (33R–34R) → Under Armour LG (34–36)

View measurement evidence

Average difference: Under Armour +2.3 cm waist

Consistency: 2 of 3 sizes favor Under Armour · 1 neutral

Measurement used: Waist

Men's Footwear

Strong evidence

Under Armour and H&M sizes line up closely in 9 of 10 comparable men's footwear sizes, 1 favoring Under Armour.

Average difference: +1.0 mm

Closest foot length measurement match: H&M 10 → Under Armour 9.5

View measurement evidence

Consistency: 9 of 10 sizes are neutral matches · 1 favor Under Armour

Measurement used: Foot length

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: Tops, bottoms, and footwear line up closely.

Men: Tops and footwear line up closely, while bottoms have less conclusive evidence.

Use the converter for a category-specific recommendation.

Related size converters

Men's Bottoms (Under Armour to H&M)

Check the original size charts

Want to inspect the source measurements yourself? View the available H&M and Under Armour size-chart data before using the converter.

Measurement data source: brand size-chart data available on July 12, 2026.

FAQ

Can I compare H&M and Under Armour directly?

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

Does Under Armour run bigger than H&M?

It varies by category.

Women: Tops, bottoms, and footwear line up closely. Footwear has the strongest evidence.

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

Is the same size equivalent across H&M and Under Armour?

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.