Measure your baby’s foot in inches or centimeters Find the right measurement in inches or centimeters on the chart Match up their measurement with the US, UK, EU, or JP size depending on where ...

This should be the correct size for your baby's cot/crib, so it fits perfectly and there are no dangerous or uncomfortable gaps. In the US, the standard size of a crib mattress is 27.5 x 52 inches ...