When shopping internationally—whether on AliExpress, ASOS, or Amazon—the "add two sizes" rule often fails because sizing standards in China, the UK, and Europe vary significantly. This guide provides trusted, researched data and an interactive calculator for every major garment type to help you find your perfect fit across global women's markets.
👠 1. Footwear: The International Shoe Map
Shoes are the most standardized item you can buy, but width remains the biggest challenge. Women's shoes in the US/UK are typically manufactured at a "B" width, while Men's are a "D" width. This means women's shoes are natively narrower.
- US Standards: Men's Size + 1.5 (or 2 for wide feet) = Women's Size.
- UK/EU Standards: Usually Unisex; if labeled "Women's Fit," size up by 1 full size.
- Chinese Standards: Uses Mondopoint (millimeter) size. e.g. 270mm = CN 270.
Instant Shoe Size Calculator
Select region and enter size.
| US Men's | US Women's | UK Women's | EU (Unisex) | AU Women's | Foot Length (cm) | Foot Length (in) |
|---|---|---|---|---|---|---|
| 8 | 9.5 | 7.5 | 41 | 9.5 | 25.5 cm | 10.0" |
| 9 | 10.5 | 8.5 | 42.5 | 10.5 | 26.5 cm | 10.4" |
| 10 | 11.5 | 9.5 | 44 | 11.5 | 27.5 cm | 10.8" |
| 11 | 12.5 | 10.5 | 45 | 12.5 | 28.5 cm | 11.2" |
| 12 | 13.5 | 11.5 | 46.5 | 13.5 | 29.5 cm | 11.6" |
👗 2. Dresses & One-Pieces
Dresses require balancing the shoulders and the hips. Because masculine-born frames often have broader shoulders, the "top" area (bust/shoulders) measurement is your true priority. If a dress doesn't zip past your chest, it doesn't matter how well it fits your waist.
Stretchy Fabrics Rule of Thumb:
For stretchy fabrics, you generally translate your Men's Alpha Size directly to Women's by shifting **two sizes up**: Men's Small → Women's **Large** | Men's Medium → Women's **XL**
Instant Dress Size Calculator
Measure broadly around the widest part.
| US Numerical | US Alpha | UK / AU | EU | China/Asia |
|---|---|---|---|---|
| -- | -- | -- | -- | -- |
| Chest (Inches) | Chest (cm) | US Numerical | US Alpha | UK / AU | EU | China/Asia |
|---|---|---|---|---|---|---|
| 30-32" | 76-81 cm | 0 - 2 | XXS | 4 - 6 | 32 - 34 | Small |
| 32-34" | 81-86 cm | 4 - 6 | XS | 8 - 10 | 36 - 38 | Medium |
| 32-34" | 81-86 cm | 6 - 8 | Small | 10 - 12 | 38 - 40 | Large |
| 35-37" | 89-94 cm | 10 - 12 | Medium | 14 - 16 | 42 - 44 | XL |
| 38-40" | 96-101 cm | 14 - 16 | Large | 18 - 20 | 46 - 48 | XXL |
| 41-43" | 104-109 cm | 18 - 20 | XL | 22 - 24 | 50 - 52 | 3XL |
| 44-46" | 112-117 cm | 22 - 24 | XXL / 2X | 26 - 28 | 54 - 56 | 4XL |
👖 3. Skirts & Lower Body
Since men's hips are typically narrower and waists sit differently, skirts can be tricky. "High-waisted" styles are universally flattering because they sit directly on the true waist (the narrowest part of your torso, an inch above the belly button) giving the optical illusion of wider hips below.
The Magic Number 21:
To find your US numerical women's clothing size (like Size 8, Size 12, etc.), take your typical Men's pant waist size (e.g., 34) and subtract 21.
Instant Skirt & Pant Calculator
What size jeans do you typically buy?
| US Numerical | UK / AU | EU | China/Asia |
|---|---|---|---|
| -- | -- | -- | -- |
| Men's Waist Size | Waist (cm) | US Numerical | UK / AU | EU | China/Asia |
|---|---|---|---|---|---|
| 24 - 25" | 61 - 64 cm | 0 - 2 | 4 - 6 | 32 - 34 | Small |
| 26 - 27" | 66 - 69 cm | 2 - 4 | 6 - 8 | 36 | Medium |
| 28 - 29" | 71 - 74 cm | 6 - 8 | 10 - 12 | 36 - 38 | L |
| 30 - 32" | 76 - 81 cm | 10 - 12 | 14 - 16 | 40 - 42 | XL |
| 33 - 35" | 84 - 89 cm | 12 - 14 | 16 - 18 | 42 - 44 | XXL |
| 36 - 38" | 91 - 96 cm | 16 - 18 | 20 - 22 | 46 - 48 | 3XL |
| 40 - 42" | 101 - 107 cm | 20 - 22 | 24 - 26 | 50 - 52 | 4XL |
👚 4. Tops, Blouses & Collar Sizing
When translating formal wear or fitted tops, collar and chest measurements are paramount. Men's dress shirts explicitly state the neck size (e.g., 16.5"), which usually anchors the entire garment's fit. Women's clothing rarely states a neck size, assuming a proportional neck-to-chest ratio. A wider neck often correlates directly to broader shoulders.
Top & Blouse Calculator
Commonly found on men's dress shirts.
| US Women's Alpha | US Numerical | China/Asia Top |
|---|---|---|
| -- | -- | -- |
| Men's Collar (Inches) | Collar (cm) | US Women's Alpha | US Numerical | China/Asia Top |
|---|---|---|---|---|
| 12.0 - 12.5" | 31 - 32 cm | XXS | 0 - 2 | Small |
| 13.0 - 13.5" | 33 - 34 cm | XS | 2 - 4 | Medium |
| 14.0 - 14.5" | 36 - 37 cm | Small | 6 - 8 | Large |
| 15.0 - 15.5" | 38 - 39 cm | Medium | 10 - 12 | XL |
| 16.0 - 16.5" | 41 - 42 cm | Large | 14 - 16 | XXL |
| 17.0 - 17.5" | 43 - 44 cm | XL | 18 - 20 | 3XL |
| 18.0 - 18.5" | 46 - 47 cm | XXL / 2X | 22 - 24 | 4XL |
🛍️ 5. Regional Shopping “Secrets” Summary
- China (AliExpress/Wish/Shein): Most items follow "Asian Sizing." You must almost always size up 2 to 3 full sizes from your US Women's estimate. An Asian "3XL" often fits exactly like a US Women's "Large." Pay attention solely to the centimeter charts.
- UK & Australia (ASOS/Curve): UK and AU sizes are generally one to two numerical steps larger than US sizes. A US Size 6 is roughly a UK/AU Size 10.
- EU (H&M/Zara): Uses numbers like 36, 38, 40. These strictly correspond to the half-chest measurement in centimeters. A US Size 8 is usually a European 38.
A Final Tip on Fabric
If you are between sizes, always prioritize fabric type. Choose the garment that advertises Spandex or Elastane (at least 3-5%). High-stretch fabrics are incredibly forgiving and will adapt to variations in shoulder and hip width gracefully.