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WhatSizer

Right size, every season

100% Free

WhatSizer is completely free to use - no subscriptions, no hidden fees

Instant Fit

Enter your child's age and size to get the right fit immediately

Instant Fit

Future Size Forecast

See what size they'll need next season

Future Size Forecast

Size Converter

Convert sizes across brands and countries

Size Converter

Easy Sharing

Share size info with grandparents and friends

Easy Sharing

Free & Fast

100% free to use and built for growing kids

Free & Fast

Remember Sizes

Track your kid's growth—no more size guessing.

Next Season's Sizes

We use WHO growth data to predict what they'll need next.

Shop Smarter

Find clothes and shoes that fit—season after season.

WhatSizer App Interface

Share WhatSizer with Friends and Family

Help other parents find the right sizes for their children by sharing WhatSizer with your network.

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