The Core Rule: Chinese Sizing Runs Small
The fundamental rule that every ACBuy buyer must internalize: Chinese sizing, when using Chinese-standard measurements, runs approximately 1–2 sizes smaller than US sizing for both shoes and clothing. This isn't a universal law — it varies by product type, brand, and individual seller — but it's the correct starting assumption when no other sizing information is available.
For shoes: many Weidian sellers now list sizes in EU or US format, which are more reliable. When sizes are listed in EU, use a standard EU-to-US conversion chart (easily found on Google). When a Chinese seller uses their own sizing (Chinese size "42" ≠ EU 42), always check for a size chart attachment in the product listing or ask in your order notes.
Shoe Sizing Conversion Table
General guidance for common shoe size conversions (varies by seller):
Clothing Sizing Guide
Clothing sizing varies more by seller than shoes. Use this as a starting point:
How to Get Your Measurements Right
The most reliable sizing method uses body measurements rather than size labels:
- 1For clothing: measure your chest, waist, hip, and inseam in centimeters
- 2Compare your measurements to the seller's CM-based size chart (most quality sellers provide this)
- 3For shoes: measure your foot length in centimeters and compare to the seller's CM insole measurement
- 4For jerseys: measure your chest and compare to seller chart; add 5–8cm for looser athletic fit
- 5When between sizes: go up for comfort-fit items, go true for athletic-cut items
- 6Leave size-specific notes in your order to the seller when buying via ACBuy
Seller-Specific Sizing Tips
Beyond general guidance, individual Weidian sellers often have their own sizing quirks. The most reliable source of seller-specific sizing information is recent buyer reviews and Reddit QC posts. When you find a product on the ACBuy spreadsheet that you're interested in, search Reddit for "[product name] sizing" or "[Weidian ID] sizing" to find firsthand accounts from buyers who have already ordered.
This community-sourced sizing data is often far more accurate than any conversion table, because it reflects the actual production reality of a specific batch. Experienced ACBuy buyers consistently credit Reddit sizing threads as their #1 tool for avoiding sizing mistakes.
