A complete size conversion guide for the JoyaGoo spreadsheet. Convert Asian sizes to US sizes for shoes, clothing, pants, and accessories with confidence.
Why Sizing Is the Most Common Problem
Sizing is the number one reason for disappointment in the JoyaGoo spreadsheet. The products are sourced from Asian manufacturers, and Asian sizing is consistently smaller than US sizing. A medium in Asia is closer to a small in the US. A US size 10 shoe is often an Asian size 44, which may run narrow. Understanding these differences before you order saves you from the most common beginner mistake.
General Size Conversion Reference
| US Small | Asian Medium |
| US Medium | Asian Large |
| US Large | Asian XL |
| US XL | Asian XXL |
| US Shoe 8 | Asian 41-42 |
| US Shoe 9 | Asian 42-43 |
| US Shoe 10 | Asian 43-44 |
| US Shoe 11 | Asian 44-45 |
Shoe Size Conversion
Shoe sizing is the most complex because different models run differently. As a general rule, Asian shoe sizes run half a size smaller than US sizes. For example, if you wear a US 9, order an Asian size that corresponds to US 9.5. For narrow feet, this is usually sufficient. For wide feet, size up a full size. Always check the seller notes for each model, as some run larger or smaller than the general rule.
How to Measure Yourself
Chest: measure around the widest part with arms relaxed
Waist: measure at the narrowest point of your torso
Hips: measure around the widest part of your hips
Inseam: measure from crotch to ankle along the inside leg
Shoe: trace foot on paper and measure longest point
Compare all measurements to the seller's size chart
Clothing Size Conversion
For T-shirts, hoodies, and jackets, Asian sizing typically runs one full size smaller than US sizing. A US medium is an Asian large. For oversized styles, the sizing may be intentional, so check the measurements in the seller notes. For standard fits, size up once. For a relaxed fit, size up twice. The chest and shoulder measurements are the most important to compare against your own clothing.
Pro Tip
Keep a note on your phone with your measurements in both inches and centimeters. Most sellers use centimeters, but some use inches. Having both ready saves time and reduces ordering errors.
Pants and Shorts Size Conversion
Pants are the most size-sensitive category. Asian sizing is smaller in both waist and inseam. A US size 32 waist is often an Asian 34. Inseam lengths are also shorter, typically by 1-2 inches. Always check the size chart for waist, hip, and inseam measurements. Compare these against a pair of pants you already own. Do not rely on your usual US size alone.
Accessories and Headwear
Accessories are the easiest category for sizing. Most bags and wallets are one-size. Caps are usually adjustable with snapback or strap closures. Beanies are stretchy and fit most head sizes. For fitted caps, measure your head circumference and match it to the size chart. The only accessory that requires attention is belts, where you need to check the hole spacing and total length.
How to Measure Yourself Correctly
Use a soft measuring tape for accuracy. For chest, measure around the widest part. For waist, measure at the narrowest point. For hips, measure around the widest part. For inseam, measure from crotch to ankle. For shoes, trace your foot on paper and measure the longest point. Write these measurements down and compare them to the seller's size chart before every order.
When to Size Up vs. Size Down
Size up when: the item is Asian sizing, you are between sizes, you prefer a relaxed fit, or you plan to layer. Size down when: the item is explicitly oversized, you prefer a tight fit, or the seller notes say the item runs large. When in doubt, size up. It is easier to tailor a slightly large item than to stretch a too-small one.
Frequently Asked Questions
Do all Asian sizes run small?
Most do, but the degree varies. Shoes run half a size small. Clothing runs one size small. Pants run 1-2 inches smaller in waist and inseam.
What if I am between sizes?
Size up. It is better to have a slightly loose fit than a tight one. Oversized styles can be adjusted with tailoring.
Can I return items for size issues?
Most sellers do not accept returns for sizing issues. This is why accurate measurement before ordering is so important.
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