Journal
The reference for international sizing
Editorial guides, brand-specific fit notes and how-to articles from the SizeAtlas team. Everything you need to buy the right size, anywhere in the world.
Featured
Shoe Sizing
US vs EU Shoe Sizes Explained
US and EU shoe sizes measure different things on different scales. Here's exactly how they convert and where the systems disagree.
3 min read
Fit & Measurement
How to Measure Your Feet Correctly
A five-minute method for measuring foot length and width at home — with the exact steps brands actually recommend.
3 min read
Shoe Sizing
Why Shoe Sizes Differ Between Countries
The historical reason a US 10, UK 9 and EU 44 refer to the same shoe — and why brands still can't agree.
2 min read
Browse by category
Shoe Sizing
4 articlesHow US, UK, EU and Mondopoint systems relate — and where they don't.
Clothing Sizing
2 articlesCountry-by-country breakdowns of numeric and letter sizing.
Brand Guides
2 articlesHow specific brands actually fit, in plain language.
Buying Guides
1 articlePractical advice for ordering online across borders.
Fit & Measurement
3 articlesMeasure yourself once, buy correctly forever.
Kids & Baby Sizes
1 articleAge, height, and shoe size charts for growing feet.
Sports & Outdoor
1 articleRunning, hiking, cycling — sizing rules that differ from streetwear.
International Shopping
2 articlesConfidence when buying from another country.
All articles
Shoe Sizing
US vs EU Shoe Sizes Explained
US and EU shoe sizes measure different things on different scales. Here's exactly how they convert and where the systems disagree.
3 min read · Updated July 1, 2026
Fit & Measurement
How to Measure Your Feet Correctly
A five-minute method for measuring foot length and width at home — with the exact steps brands actually recommend.
3 min read · Updated July 1, 2026
Shoe Sizing
Why Shoe Sizes Differ Between Countries
The historical reason a US 10, UK 9 and EU 44 refer to the same shoe — and why brands still can't agree.
2 min read · Updated July 1, 2026
Shoe Sizing
Men's vs Women's Shoe Sizes
The difference is 1.5 US sizes — but the shoes themselves aren't identical. Here's what changes when a shoe is labeled for men or women.
2 min read · Updated July 1, 2026
Kids & Baby Sizes
Children's Shoe Size Guide
How kids' shoe sizes work from infant to teen, when to measure, and how much growing room to leave.
2 min read · Updated July 1, 2026
Clothing Sizing
US Clothing Sizes Explained
Why US clothing sizes have drifted, how numeric and letter sizes relate, and what a US Medium actually means abroad.
2 min read · Updated July 1, 2026
Clothing Sizing
European Clothing Sizes Explained
How the EU numeric system works, why it feels smaller than US sizing, and how it maps to UK, Italian and French sizes.
2 min read · Updated July 1, 2026
Buying Guides
How to Buy Shoes Online Without Trying Them On
A ten-minute pre-checkout routine that eliminates most sizing mistakes when shopping online.
2 min read · Updated July 1, 2026
Brand Guides
Nike Size Guide
How Nike shoes actually fit across silhouettes — what runs true, what runs half a size large, and how women's compares to men's.
2 min read · Updated July 1, 2026
Brand Guides
Adidas Size Guide
How Adidas shoes fit across Originals, Ultraboost, and Terrex — where they run true, narrow, or long.
2 min read · Updated July 1, 2026
International Shopping
Japanese Sizes Explained
How Japanese clothing and shoe sizes work — Mondopoint for shoes, cm-based for apparel — and how to translate them to US and EU.
2 min read · Updated July 1, 2026
Shoe Sizing
Mondopoint: The Only Sizing System That Makes Sense
How ISO 9407 works, why ski boots and militaries use it, and why fashion doesn't.
2 min read · Updated July 2, 2026
Fit & Measurement
How to Measure Your Bra Size Correctly
The two-measurement method that gets 80% of fittings right — and the checks that fix the other 20%.
2 min read · Updated July 3, 2026
Fit & Measurement
How to Measure Your Ring Size at Home
Two methods for finding your ring size without a jeweler — and which one is actually accurate.
2 min read · Updated July 4, 2026
Sports & Outdoor
Running Shoe Sizing Is Different
Why running shoes traditionally go a half size up — and when that rule doesn't apply.
2 min read · Updated July 5, 2026
International Shopping
Italian Sizing Guide
Why an Italian 42 is an EU 38 — and how to shop confidently from Italian brands online.
2 min read · Updated July 6, 2026