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Measure While Standing
Never measure while child is sitting or dangling their feet. Foot bones spread up to 5mm under full standing body weight.
Heel-to-Toe Precision
Kids Shoe Size Calculator
Enter your child's heel-to-toe measurement in inches, centimeters, or millimeters. Features automatic +12mm growing room with instant US, UK, India, and EU conversions.
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Fast Answer: To calculate kids shoe size from foot length, enter heel-to-toe distance. The calculator adds 10–12 mm (~0.5 in) of growth room automatically and matches to official US, UK, and EU size standards.
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Automatic 10–12 mm growing room factored into every size calculation.
Enter foot length below.
We add room to grow!
We add room to grow!
Size Finder
Includes +12mm growing room How long is the foot?
Measure both feet standing; use the longer foot.
Clinical Podiatry Standard
Three rules for measuring kids' feet
Feet expand under body weight. Follow these simple guidelines for true sizing:
2
Measure Both Feet
Over 60% of children have one foot slightly larger than the other. Always enter the longer measurement to avoid cramped toes.
3
Wear Normal Socks
Measure with the socks your child will actually wear with their sneakers. Thick winter socks can add 3 to 4 mm of thickness.