As fashion lovers embrace secondhand shopping like never before—whether for sustainability, uniqueness, or savings—one major challenge remains: navigating international sizing.
If you're scrolling through secondhand gems on Vinted in France, Depop in the UK, Mercari in Japan, or The RealReal in the U.S., it's easy to get swept up in vintage Dior or pre-loved Acne Studios. But hit "Buy" without understanding the sizing, and that perfect piece may end up being unwearable.
Welcome to your essential global size comparison guide—because preloved fashion should feel just as good as it looks.
Why Sizes Vary So Much Around the World
- Different measurement systems (inches vs. centimeters)
- Body standard differences (average body shapes vary by region)
- Brand-specific sizing quirks
- Vintage vs. modern sizing (a 1970s size 10 is not today's 10!)
Size Comparison Quick Guide
Here’s a simplified chart to help you decode international sizes when buying secondhand online:
Tip: Always check if the seller lists exact measurements (bust, waist, hip, inseam, shoulder width). These are far more reliable than tags.
Know the Fit: Not All Labels Are Created Equal
- Vintage tends to run small. A vintage EU 38 may fit like a modern EU 34–36.
- Japanese sizes often fit smaller frames. A JP M may feel more like a US XS/S.
- Korean fashion can have a "free size" or "one-size" label, which often translates to US XS–S.
- High-end designer brands sometimes have European sizing even when sold in the U.S.
Return Policies Aren’t Guaranteed
With secondhand platforms, returns are often limited or non-existent. That’s why getting the size right the first time is crucial. Ask the seller questions. Compare the measurements with something in your own wardrobe. And when in doubt—size up and tailor down.
Pro Tip: Use a Sizing Conversion App
Apps like SizeCharter, WhatSize, or ShopLook can help you convert sizes across countries and even by brand. Some secondhand marketplaces like Vestiaire Collective and Grailed offer built-in size guides based on item origin.
Before you click "Add to Cart" on that stunning French trench coat or Tokyo streetwear hoodie, take a moment. Check the size, compare it globally, and buy smarter.
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