Baby Size Calculators & Charts
Find the right baby clothing size and convert between countries' sizing systems.
Baby clothes are sized by age in some countries and by height in others, which makes shopping across brands and borders confusing. Our size calculator takes your baby's age, height (in centimetres), and optional weight and suggests a size, then shows the equivalent in the AU, UK, US, EU, Japan, and Korea systems so you can buy confidently anywhere.
Looking to convert between two specific systems? See our US to EU baby clothes size converter for quick charts.
Remember that sizing varies between brands. When in doubt, size up — babies grow fast, and a slightly roomy outfit lasts longer than one that's already snug.