A 150 mm foot marks the small end of this range, a length most children reach around age three; Austrian tracking shows the foot still adding close to 1 mm a month at this stage.
Brand fit: A WMS-certified EU 24 builds 9 to 15 mm of room into its 150 mm length, so it measures longer inside than an uncertified 24 carrying the same stamp.
Availability: The smallest EU 24 sits at the border between toddler and pre-school ranges, so it appears in first-walker lines rather than general kids' shelves; measuring inner length matters more than the label here.
EU to US conversion
EU to US kids' sizing runs smoothly until EU 34, where the US column restarts at 1, so EU 34 is US 1 rather than the US 13.5 just before it. EU 33 is US 13, then the next size up drops to US 1 while the foot keeps growing. Because the US number falls as the shoe gets bigger here, matching by the EU value or the millimetre length is the only safe way through the jump.
At this size, EU to US
One size up from EU 24, US moves 0.5 to US 8.5 while EU rises 1 to EU 25, so the two scales spread wider. Both EU 24 and US 8 are whole numbers here, so nothing rounds. For EU 24, the US column here runs US 8, US 8.5, US 9, stepping a half size at a time.
Size Chart EU US UK CM 24 8 7 15 25 8.5 7.5 15.5 26 9 8 16 27 9.5 8.5 16.5
Frequently Asked Questions Does EU 24 round up or down in US? With the foot still growing, round to the larger size: the extra millimetres become fit within weeks. Aim for 12 to 17 mm past the longest toe when the shoe is on.
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Note Kids sizes transition to adult sizes around EU 38 / US 5 Children's feet grow rapidly - remeasure every 3-4 months Allow 10-15mm growing room when fitting Shoe sizes can vary by brand and style See a number that looks off? Report an error on this page.