Child Clothing Size Calculator
Recommended US Size
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Size Range
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How Children's Clothing Sizes Work
US children's clothing sizes are based primarily on height and weight rather than age alone. While age can serve as a starting point, children of the same age can vary significantly in size. This calculator uses standard US sizing charts to recommend the best fit based on your child's measurements.
For infants, sizes are typically labeled by age range (0-3M, 3-6M, etc.). Toddler sizes use a T suffix (2T, 3T, 4T). Youth sizes start at 5 or XS and go up to 16 or XXL. Height is generally the most reliable measurement for determining clothing size, followed by weight.
Keep in mind that sizing varies between brands. European and UK sizes use different systems. When in doubt, measure your child and compare to the brand's specific size chart. When between sizes, it is usually better to size up so your child has room to grow.
Frequently Asked Questions
How do I measure my child for clothing?
Measure height from head to toe while standing straight (or lying flat for infants). Measure weight on a scale. For pants, measure the inseam from the crotch to the ankle.
What is the difference between 24M and 2T?
24M clothing is designed for babies and tends to have a roomier diaper area. 2T is designed for toddlers, is slimmer through the body, and may be slightly longer.
Do children clothing sizes vary by brand?
Yes, sizing can vary significantly between brands. Some brands run large, others run small. Always check the brand specific size chart when ordering online.
How often do children outgrow clothing?
Children typically move up a size every 3-6 months during the first year, every 6-9 months for toddlers, and about once a year for school-age children.