Women’s Clothing Size Conversion Guide
Updated: 03 Mar 2026
Shopping for clothes across different countries or transitioning between youth and adult sizing can be confusing. Size labels vary widely between the United States, Europe, and the United Kingdom, and there is no single universal standard. This guide provides practical conversion charts to help you find your perfect fit, whether you are shopping online from an international retailer, buying gifts, or moving between youth and adult sizing systems.
How to Take Your Measurements
Before using any size chart, the most reliable approach is to measure yourself with a soft measuring tape. Sizes vary between brands, so knowing your actual measurements in inches or centimeters is far more useful than relying on a label alone.
| Measurement | How to Measure |
|---|---|
| Bust | Measure around the fullest part of your chest, keeping the tape parallel to the floor. |
| Waist | Measure around the narrowest part of your torso, usually just above your belly button. |
| Hips | Measure around the fullest part of your hips and seat, about 7–9 inches below your waist. |
Once you have your measurements, use them alongside the charts below. If you fall between two sizes, consider the garment type: size up for structured or fitted pieces, and go with your smaller measurement for stretchy or relaxed fabrics.
Youth to Women’s Size Conversion
As girls transition from youth clothing to women’s sizing, the numbering system changes entirely. Youth sizes typically use small numbers (2 through 16) based on age and height, while women’s sizes shift to even numbers and letter designations (XS, S, M, L, XL). The overlap zone , usually Youth L (10–12) to Youth XL (14–16) , corresponds roughly to Women’s XS to S.
Keep in mind that youth clothing is generally cut with less curve and a narrower silhouette than women’s clothing. Even if the measurements align, the fit may feel different. Many shoppers in this transition range find that trying both youth and junior women’s sizes is worthwhile.
| Youth Size | Women’s US Size | Bust (inches) | Waist (inches) |
|---|---|---|---|
| Youth XS (2-4) | XXXS / 00 | 28–30 | 22–23 |
| Youth S (6-6X) | XXS / 0 | 30–31 | 23–24 |
| Youth M (7-8) | XS / 0–2 | 31–32 | 24–25 |
| Youth L (10-12) | S / 4–6 | 33–35 | 26–28 |
| Youth XL (14-16) | M / 8–10 | 36–38 | 29–31 |
Note: These conversions are approximate. Youth sizing is not standardized across brands, and bust/waist measurements are given as general ranges for guidance only.
EU to US Size Conversion
European clothing sizes follow a numeric system that differs significantly from US sizing. EU sizes are based on body measurements in centimeters and typically run about 30 to 32 numbers higher than their US equivalents. For example, a US size 4 is generally equivalent to an EU size 36.
European sizing is used across most of continental Europe, including France, Germany, Italy, Spain, and beyond, though minor variations exist between countries. When shopping from European brands like Zara (Spain), H&M (Sweden), or Mango (Spain), these conversions will generally apply , though always check the specific brand’s size chart when available.
| EU Size | US Size | Bust (inches) | Waist (inches) |
|---|---|---|---|
| 32 | 0 / XXS | 30–31 | 23–24 |
| 34 | 2 / XS | 31–32 | 25–26 |
| 36 | 4 / S | 33–34 | 27–28 |
| 38 | 6 / S–M | 35–36 | 29–30 |
| 40 | 8 / M | 37–38 | 31–32 |
| 42 | 10 / M–L | 39–40 | 33–34 |
| 44 | 12 / L | 41–42 | 35–36 |
| 46 | 14 / XL | 43–44 | 37–38 |
| 48 | 16 / XL–XXL | 45–46 | 39–40 |
| 50 | 18 / XXL | 47–48 | 41–42 |
Tip: European brands often provide size guides in centimeters on their websites. If you know your bust and waist measurements in centimeters, divide by 2.54 to convert to inches, or use the measurements directly with the brand’s own chart for the most accurate result.
UK to US Size Conversion
UK women’s clothing sizes use the same numeric format as US sizes but run approximately two sizes higher. A UK size 8 is equivalent to a US size 4, and a UK size 12 equals a US size 8. This consistent two-size gap makes UK-to-US conversion fairly straightforward once you know the rule.
UK sizing is used by British retailers such as ASOS, Topshop, Marks & Spencer, and many others. Because ASOS and similar platforms are popular globally, understanding this conversion is particularly useful for international online shoppers.
| UK Size | US Size | Bust (inches) | Waist (inches) |
|---|---|---|---|
| UK 4 | US 0 / XXS | 30–31 | 23–24 |
| UK 6 | US 2 / XS | 32–33 | 25–26 |
| UK 8 | US 4 / S | 34–35 | 27–28 |
| UK 10 | US 6 / S–M | 36–37 | 29–30 |
| UK 12 | US 8 / M | 38–39 | 31–32 |
| UK 14 | US 10 / M–L | 40–41 | 33–34 |
| UK 16 | US 12 / L | 42–43 | 35–36 |
| UK 18 | US 14 / XL | 44–45 | 37–38 |
| UK 20 | US 16 / XXL | 46–47 | 39–40 |
| UK 22 | US 18 / XXL | 48–49 | 41–42 |
Quick tip: To convert a UK size to a US size, simply subtract 4. For example, UK 14 minus 4 equals US 10. This rule holds reliably across most mainstream UK brands.
Additional Tips for Finding the Right Fit
Finding the perfect size becomes much easier when you focus on accurate measurements rather than relying solely on size labels.
Check Brand-Specific Size Charts
No size chart is universal. Even within the same country, different brands cut their clothing differently. A size 8 at one retailer may fit like a 6 at another. Whenever possible, refer to the specific brand’s size guide rather than relying solely on general conversion tables.
Understand Vanity Sizing
Vanity sizing , the practice of labeling larger garments with smaller size numbers , is common in the US and to a lesser extent in the UK. This means that a US size 8 today may have the measurements of what was historically labeled a 12. When converting between sizing systems, always anchor your decision to actual body measurements rather than size numbers alone.
Consider the Garment Type
Fit expectations vary by clothing type. For denim, always size based on your waist and hip measurements. For dresses and tops, your bust measurement is usually the most important. For tailored or structured blazers, shoulder width and bust are the key measurements. Knowing which measurement matters most for each garment type helps you choose the best size confidently.
When Shopping Online Internationally
International online retailers often list sizes in multiple systems (e.g., US 6 / UK 10 / EU 38). When a garment lists measurements directly , such as chest 36 inches or waist 28 inches , always use those over the size label. Measurements are always more reliable than size numbers for cross-border purchases.
