Clothing Size Converter — US, EU & UK Dress and Suit Sizes

Pick a chart and a size you know to read the equivalent in US, UK, EU, Italian, and Japanese sizing.

Pick a chart, system, and size to see equivalents.

How this conversion works. Charts follow common industry alignments on the size-designation framework of ISO 8559-1 (size designation of clothes). Sizing varies by brand and cut — use the converted size as a starting point, not a guarantee of fit.

How to use

  1. Pick the chart — women’s dress, men’s suit, or men’s shirt collar.
  2. Choose the sizing system you know and your size in it.
  3. Read the equivalent size in every other system.

Frequently asked questions

How reliable are international size conversions?

They are industry-standard alignments, not guarantees — brands cut differently and vanity sizing shifts over time. Treat the result as the size to try first, and check the brand’s own measurement chart when available.

What is the difference between US and UK dress sizes?

The same garment is numbered 4 higher in the UK: a US 8 is a UK 12. EU sizes run US + 32 (US 8 = EU 40), Italian sizes US + 36.

How do men’s suit sizes convert?

US and UK suit numbers match (chest in inches); EU adds 10 (US 40 = EU 50). Japanese suits use letter-number combos but align with EU numeric sizing here.

How do shirt collar sizes work?

US/UK collars are inches, EU collars centimeters: EU ≈ inches × 2.54 rounded — a 15.5″ collar is EU 39–40.

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