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Clothing Size Converter

Ordering clothes from an international retailer means navigating size charts that have little in common with what you know at home. A US size 8 dress is a EU 38, a UK 12, and roughly a Japanese 13 — all referring to the same garment. This converter maps those numbering systems against each other so you can start in any system and find the equivalent in all others, covering women’s and men’s tops, dresses, pants, suits, and outerwear.

How Clothing Size Conversion Is Calculated

The systems use different numbering conventions anchored to body measurements. EU sizes for women are roughly the bust measurement in centimeters divided into a scale starting at 32. US sizes use an arbitrary even-number scale (2, 4, 6…) that does not directly encode a measurement. UK women’s sizes consistently run 4 higher than US (US 6 = UK 10). Men’s suit sizes in the US and UK use chest measurements in inches, while EU suit sizes add 10 to that number (US 42 = EU 52). Asian sizes (particularly Japanese) tend to run approximately 1-2 US sizes smaller, though this varies significantly by brand.

Worked Examples

Example 1 — Women’s dress, US to EU and UK A US size 10 dress is a EU 40 and a UK 14. The EU equivalent adds 30 to the US size (10 + 30 = 40). The UK equivalent adds 4 (10 + 4 = 14). For a Japanese size chart, a US 10 corresponds roughly to a Japanese 17 or M-L, depending on the brand’s conversion.

Example 2 — Men’s suit, US to EU A US size 40 regular suit jacket corresponds to EU 50. The chest measurement in inches is 40; EU adds 10, giving 50. UK men’s suit sizing matches US (both use chest inches), so a US 40 is also a UK 40. The “regular” vs. “long” designation applies separately across all systems and refers to sleeve/body length, not chest size.

Example 3 — Women’s pants, waist and inseam European pants sizes are often expressed as two numbers: waist x inseam in centimeters. A US size 28 x 30 (waist 28 inches, inseam 30 inches) converts to approximately EU 44 x 76 (28 x 2.54 = 71 cm waist; 30 x 2.54 = 76 cm inseam). Some EU brands use just the waist number (28W = EU 44), while others use the full two-number format.

International Size Reference Table

When to Use This Converter

• Ordering from European brands like Zara, H&M, or ASOS where sizes are listed in EU numbers
• Purchasing from Japanese or Korean fashion sites where sizes run smaller than US equivalents
• Comparing suit sizes across US and Italian (EU) tailoring brands
• Sending clothing as a gift to someone in another country whose local size you know but need to translate for a domestic purchase
• Converting kids’ sizes, which also use different schemes (EU uses age-based and centimeter-based sizing)

Common Mistakes

1. Treating size charts as universal — clothing sizes are not legally standardized anywhere. A brand’s own size chart overrides any general conversion table. Always look for the specific retailer’s size guide before ordering.
2. Ignoring vanity sizing — US brands have been labeling garments smaller than their actual measurements for decades. A garment labeled US 8 at a mid-market brand may have the same measurements as a size 10 from a decade ago. EU and Asian brands are generally less affected by this practice.
3. Confusing men’s and women’s EU systems — EU women’s sizes run 32-50 while EU men’s shirt sizes follow collar measurements (37, 38, 39…) and suit sizes use chest in centimeters (46-62). They are not the same scale.
4. Overlooking fit type — slim, regular, and relaxed fits use different grading even within the same numbered size. A slim-fit size 40 jacket fits more like a regular-fit 38. Always check whether a brand’s sizing assumes a particular cut.

Context and Applications

The absence of a global clothing size standard has practical costs — one study found that incorrect sizing accounts for more than 60% of returns in online fashion retail. Knowing how systems relate to each other reduces that risk. EU numeric sizing has the advantage of encoding actual measurements: EU women’s size 38 corresponds to a 76-78 cm bust, which you can verify directly against your tape measure. US letter sizing (S/M/L) is the least precise because each brand interprets those letters differently. When precision matters — tailored items, formalwear, or expensive purchases — always measure and match against the brand’s measurement chart rather than relying solely on size number equivalence.

Tips

• Measure your chest, waist, and hips in both inches and centimeters and save them in your phone notes — this one-time step removes most sizing guesswork
• When ordering from Asian retailers, size up by at least one US size as a starting point, then verify against the brand’s specific measurement chart
• EU pants sizes are often listed as waist x inseam in centimeters — divide your inch measurements by 0.394 (or multiply by 2.54) to convert
• If you are between two sizes, choose the larger one for tops and jackets — a tailor can take in a garment, but cannot add fabric
• Check the return policy before ordering from any international retailer; free returns make size experimentation low risk
• Shoe sizes follow an entirely different international system — a separate shoe size converter gives more accurate results than extrapolating from clothing size equivalences