Will It Fit: Family Sizes

Zara L. Nike 43. Levi's W33 L32. Your partner's dress size. The kids' shoes they'll outgrow next month.

Will It Fit is a size tracker and international size converter for the whole family. Keep every clothing size and shoe size in one beautiful place, so you never stand in a fitting room — or an online checkout — guessing again.

👕 EVERY SIZE, EVERY BRAND
Save sizes like clothing tags: brand, item, the size on the label and the country you bought it in. T-shirts, shirts, sweaters, jackets, dresses, jeans, pants, shoes, underwear, socks and hats. Add the model (501, Slim fit, Air Max…) and whether it runs small, true to size or large. Then just search: "What size am I at Zara?"

🌍 INTERNATIONAL SIZE CONVERTER
Convert clothing sizes, shoe sizes and jeans sizes between EU, Spain/France, Germany/Netherlands/Nordic, UK, US, Italy, Japan, Korea, Mexico, Australia and Asian sizing. Letter sizes (XS–XXL), waist × length in inches, foot length in cm and kids sizes by height or age are all supported. Every saved size shows its equivalents abroad, and the quick size converter answers "what is a UK 12 in US?" in seconds. Each conversion shows an honest confidence level — exact, approximate or rough guide — because size charts are never perfectly standard.

⚠️ AVOID THE CLASSIC SIZING TRAPS
Will It Fit warns you before you buy: a UK 10 is a US 6, Italian sizes are 4 numbers higher than Spanish ones, "EU" sizes differ by two between Spain and Germany, Asian sizing often runs one size small, US men's and women's shoe sizes differ by 1.5, Mexican shoe sizes are in cm. You also get fit hints for more than 25 popular fashion and sneaker brands.

📏 MEASUREMENTS THAT WORK EVERYWHERE
Store height, foot length, chest, waist and hip in cm: the most reliable way to compare sizes across countries and brands.

🧒 KIDS' GROWTH FORECAST
Children grow fast. Add your kid's birth date and a height or foot measurement, and Will It Fit predicts when they'll need the next clothing size and shoe size, using WHO/CDC growth curves blended with their own growth pace. See the growth curve, plan back-to-school shopping, and leave the right growing room in new shoes.

👨‍👩‍👧 THE WHOLE FAMILY
You, your partner, your children, family and friends — each with their own colour and the country where they usually shop. Never get a gift size wrong again.

✨ DESIGNED TO BE ENJOYED
An editorial, fashion-magazine design with light and dark mode. Start with an example family to explore in seconds.

🔒 PRIVATE AND OFFLINE
No account, no sign-up, no ads, no tracking. Will It Fit works offline and your sizes never leave your phone.

PERFECT FOR
• Online shopping from foreign stores
• Buying clothes and shoes while travelling
• Gifts for your partner, kids, parents and friends
• Parents keeping up with growing kids
• Anyone who forgets their jeans size

Available in English, Spanish, Italian, French, German and Japanese.