Dress Size Calculator
Enter your body measurements to determine your dress size across US, UK, and EU sizing systems. The calculator uses bust measurement as the primary indicator and provides the closest matching size in each system.
Women's dress sizing is notoriously inconsistent across brands, regions, and even within a single brand's catalog over time. The same body can be a size 6 at one retailer, a size 8 at another, a size 10 at a third — even though physical body measurements haven't changed. This phenomenon, called "vanity sizing," reflects marketing decisions to make customers feel they wear smaller sizes. A modern US size 8 is approximately equivalent to a 1950s size 14 by body measurements. Add international variations (US vs. UK vs. EU sizing) and online shopping with no try-on, and finding the right size becomes a real challenge.
Body measurements (bust, waist, hips in inches or centimeters) remain the most reliable approach to sizing. Three measurements together provide better fit prediction than dress size alone. Different body shapes — pear (smaller bust/waist, fuller hips), apple (fuller bust/waist, narrower hips), hourglass (balanced bust/hips with defined waist), rectangular (similar bust/waist/hips) — all influence how a given size will fit, even if measurements match standard charts.
This calculator estimates dress sizes in US, UK, and EU systems from bust, waist, and hip measurements. Use it for: online shopping guidance, international purchase planning, gift purchases for others, or wardrobe planning. Important context: this provides estimates based on common size charts. ALWAYS check the specific brand's size chart, especially for online purchases. Reviews mentioning size run ("runs small," "runs large," "true to size") provide additional guidance. For expensive items: consider purchasing two sizes for try-on and returning one. Sizing varies dramatically between fast fashion (often runs small), luxury brands (often runs large or true to size), and specific cuts (athletic, slim, relaxed fit). Tailoring small adjustments often more economical than buying perfectly-sized items, especially for special-occasion clothing.
Inputs
Measure around the fullest part of your bust
Measure at your natural waistline
Measure around the widest part of your hips
Results
US Size
8
UK Size
12
EU Size
38
Generic
M
Size Details
| Measurement | Value |
|---|---|
| Bust | 36 inches |
| Waist | 28 inches |
| Hips | 38 inches |
| US Size | 8 |
| UK Size | 12 |
| EU Size | 38 |
| Generic Size | M |
| Bust (cm) | 91.4 cm |
| Waist (cm) | 71.1 cm |
| Hips (cm) | 96.5 cm |
Formula
How to use this calculator
- Take accurate bust measurement (around fullest part, with proper bra on, tape level).
- Take waist measurement (smallest part above navel, tape level, comfortable but not tight).
- Take hip measurement (widest part of hips/buttocks, tape level).
- Enter all three measurements.
- Review estimated sizes across US, UK, and EU systems.
- For online shopping: always cross-check with specific brand's size chart.
- Read reviews mentioning size fit ("runs small," "true to size," "runs large").
- Consider body shape: pear, apple, hourglass, rectangle affect fit.
- For between sizes: choose larger size for ease of fit (easier to tailor down than up).
- For specific brands you know: compare to ones that fit well.
- For expensive purchases: consider ordering two sizes for try-on.
- For special occasions: allow time for tailoring after delivery.
Worked examples
Standard sized woman
Bust 36", Waist 28", Hips 38". Estimated sizes: US: 6-8 (Small) UK: 10-12 EU: 38-40 Italy: 42 Hourglass shape with relatively balanced measurements. Standard sizing should work well. Different brand examples: J.Crew size 6: ~36-37" bust → fits well Banana Republic size 8: ~37-38" bust → fits well or slightly loose Anthropologie size 4: ~35-36" bust → may be tight ZARA size S: ~36" bust → fits well Brand variation: same person fits size 4 in one store, size 8 in another. Don't get attached to specific number; focus on fit.
Pear shape — different sizes top/bottom
Bust 34", Waist 26", Hips 40". Estimated sizes: By bust: US 4, UK 8, EU 36 By hips: US 10, UK 14, EU 42 Significant size difference between top and bottom (3-4 sizes). Common pear shape. Solutions: 1. Buy two pieces (top sized to bust, skirt/pants sized to hips) 2. Dress sized to hips, tailor waist and bust 3. Choose A-line or wrap dress styles (forgiving to body shape) 4. Avoid bodycon or fitted-throughout styles (won't fit both top and bottom) Many pear-shaped women report dress shopping is difficult because standard sizing assumes hourglass proportions. Brands designed for curvier bodies (Eshakti custom, ASOS Curve) better fit.
International shopping
Woman who normally wears US size 8 shopping at European brand. US 8 typically converts to: UK: 12 EU: 40 Italy: 44 (Italian sizing tends to run small) France: 38-40 Germany: 38 Same person, different numbers across regions. European brands often have different fit philosophy: - Tighter through waist - Smaller through bust for given size - Different shoulder/sleeve construction When shopping internationally: 1. Use brand-specific chart 2. Note country of origin (Italian vs. French vs. German sizing varies) 3. Read reviews from US shoppers about fit 4. Allow extra time for international returns if needed For ordering: when in doubt, order two sizes and return the worse fit.
When to use this calculator
Use this calculator for online shopping guidance, international purchase planning, gift purchases for others, or wardrobe planning.
Pair with shoe-size and other clothing-size calculators.
Important dress sizing considerations:
1. **Brand-specific sizing varies enormously.** Same body can be different numerical sizes across brands. Use brand-specific charts.
2. **International sizing differs.** US, UK, EU, Italian, Japanese all use different number systems.
3. **Vanity sizing inflated sizes over decades.** Modern "size 8" larger than 1950s "size 8." Vintage clothing runs smaller.
4. **Body shape affects fit beyond measurements.** Pear, apple, hourglass, rectangle bodies fit same size differently.
5. **Three measurements better than one.** Bust + waist + hips together provide better fit prediction.
6. **Take measurements correctly.** Tape level, not too tight, proper undergarments, no clothing over measurement area.
7. **Read fit reviews.** Other shoppers' experience ("runs small," "true to size") valuable for online purchases.
8. **Consider fabric stretch.** Stretchy fabrics forgive size mismatch; structured fabrics require precise fit.
9. **Between sizes: usually choose larger.** Easier to tailor down than to let out. Some flexibility for layering.
10. **Plus sizes have separate considerations.** Different proportional design; brands matter more for plus.
11. **Petite sizes for shorter women.** 5'4" and under; "P" suffix indicates shorter proportions.
12. **Online shopping: order returns prepared.** Free return policies common; expect some sizing trial and error.
Common mistakes to avoid
- Trusting size labels across brands. Numerical sizes vary 2-4 sizes between brands.
- Ignoring international differences. US 8 different from UK 8 (different sizes entirely).
- Skipping measurements. Taking measurements once and using them confidently for years.
- Assuming vanity sizing means it actually fits. Smaller number can fit if right cut; larger number can be too small if wrong shape.
- Buying for "current weight goal" instead of current measurements. Buy for the body you have now.
- Not reading fit reviews. Other shoppers' experiences save you time and returns.
Frequently Asked Questions
Sources & further reading
- Apparel Industry Sizing Standards — U.S. National Institute of Standards and Technology
- International Clothing Size Standards — International Organization for Standardization
- Fashion Industry Resources — Council of Fashion Designers of America