Dress Size Converter

How Does the Formula Work?

The Dress Size Converter translates women's clothing sizes across seven international sizing systems: US, UK, EU (European), IT (Italian), FR (French), AU (Australian), and JP (Japanese). Each conversion includes corresponding body measurements in both centimeters and inches, giving you the most reliable way to find your correct size when shopping internationally, online, or from foreign brands.

Understanding Size Systems

Clothing size standards differ fundamentally between regions. US sizes use even numbers starting from 0, where a smaller number means a smaller garment. UK sizes also use even numbers but offset by 4 from US sizes (US 6 = UK 10). European sizes start at 30 and increase by 2, making them roughly 30 higher than US sizes. Italian sizing adds another 6 to the EU number (EU 36 = IT 42), while French sizes match EU exactly. Australian sizes mirror UK sizes. Japanese sizes use an entirely different scale starting at 5 and increasing by 2, making direct comparison difficult without a conversion chart.

Why Body Measurements Matter

Size numbers alone are unreliable because they vary between brands, even within the same country. A US 8 at one brand may fit like a US 10 at another, a phenomenon known as "vanity sizing." Body measurements in centimeters or inches provide the most objective fit reference. The three key measurements are bust (circumference at the fullest part of the chest), waist (circumference at the narrowest point), and hip (circumference at the widest point). When your measurements fall between two sizes, most fitting experts recommend sizing up for comfort and tailoring down if needed. The converter shows measurements for each size so you can compare against your own body rather than relying on inconsistent size labels.

Online Shopping Across Borders

International e-commerce has made size conversion a daily necessity. A dress from an Italian brand lists IT 42, which equals EU 36, US 6, and UK 10. Without conversion, ordering the wrong size leads to costly returns and shipping delays. The converter eliminates this confusion by showing all seven systems simultaneously. When shopping from Zara (Spanish, uses EU), H&M (Swedish, uses EU), ASOS (British, uses UK), or Japanese brands (uses JP), simply find your known size and read across to the target system. Always check the specific brand's size chart as well, since this converter provides standard international equivalents and individual brands may deviate slightly.

How to Measure Yourself

Accurate self-measurement requires a flexible tape measure and ideally a second person to help. Stand in your underwear, relaxed, not holding your breath. For bust: wrap the tape around the fullest part of your chest, keeping it parallel to the floor. For waist: measure at the narrowest point, usually just above the belly button. For hip: measure at the widest point of your hips and buttocks. Record measurements in centimeters for the most precise international comparison. Measure at the same time of day (morning is most consistent) and re-measure every 6-12 months as body composition changes naturally.