Size Conversion Result

7
US (US)
6 7/8
UK (UK)

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All International Equivalent Sizes

RegionSizeFull Name
US 7 US
UK 6 7/8 UK
EU 56 EU
IN 22.0 IN
How to Use This Conversion
  • Size 7 in US (US) equals size 6 7/8 in UK (UK)
  • This conversion applies to Hat Sizes
  • See all equivalent sizes in the table above
  • Always check brand-specific size charts when possible
Important Notes
  • Sizes may vary between brands and manufacturers
  • These are general conversion guidelines
  • Always try on clothes when possible
  • Check return policies for online purchases

Full Size Conversion Chart

Hat Sizes: 7 US = 6 7/8 UK.

US UK EU IN
7 6 7/8 56 22.0

How Clothing Sizing Systems Work

US Sizing

US apparel uses two parallel systems — letter sizes (XS–XL) and numeric "misses" sizes — that aren't always a strict continuation of each other. US clothing sizes have also drifted looser over the decades (a phenomenon often called "vanity sizing"), so a size label from one decade or retailer can run larger than the same label today.

EU Sizing (EN 13402)

The EN 13402 European standard ties clothing sizes to actual body measurements in centimeters (bust/chest, waist, hip) rather than an arbitrary number, which is why EU sizing tends to be more consistent between brands than US or UK labels.

Why the Same Size Can Fit Differently

  • Cut and target fit vary a lot by brand and even by product line within the same brand — "slim," "regular," and "relaxed" cuts of the same labeled size can differ by several centimeters.
  • Fabric with stretch (elastane/spandex blends) fits looser at the same label than a rigid, non-stretch fabric.
  • Sizing has shifted over time — a size from an older collection often runs smaller than the same label today.
Best practice: check the specific garment's measurements against your own, not just the size label, whenever the retailer provides them.

How to Measure Yourself

  1. Bust/chest: measure around the fullest part, keeping the tape level and snug but not tight
  2. Waist: measure around the narrowest point, usually just above the navel
  3. Hips: measure around the fullest part, roughly 20 cm below the waist
  4. Compare against the brand's own measurement chart when available — it's more reliable than the size label alone

Frequently Asked Questions

This is the standard published conversion, but clothing sizing is far less standardized than shoe sizing. Two brands' garments labeled the same size can differ by a full size or more — always check the garment's own measurements when the retailer provides them.

Letter sizes (XS–XL) and numeric "misses" sizes (like 6, 8, 10) grew out of different historical sizing systems and were never fully unified, so the same body measurement can map to different labels depending on which system a specific garment uses.

It tends to be, because the EN 13402 standard ties EU labels to specific body measurements rather than a brand's own arbitrary numbering — though individual brands can still deviate from the standard.

Online Shopping Checklist

  • Check the return policy before you buy — free returns make sizing mistakes low-risk
  • Read recent reviews mentioning "runs small" or "runs large" for this specific item
  • Compare the garment or shoe's own measurement chart, not just the size label
  • When between two sizes, sizing up is usually the safer default
About This Conversion

Convert Hat Sizes size 7 from United States (US) to United Kingdom (UK) sizing. Size 7 in US equals size 6 7/8 in UK. See all equivalent international sizes.

Category:Hat Sizes
From:7 (US)
To:6 7/8 (UK)
Regions Available:4