EU 33 reaches US 13, the last number before the US children's scale restarts at 1 for bigger feet, so 13 here is a large child's size, not an adult one.
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 33, US moves 0.5 to US 13.5 while EU rises 0.5 to EU 33.5, holding their spacing. Both EU 33 and US 13 are whole numbers here, so nothing rounds. For EU 33, the US column here runs US 12.5, US 13, US 13.5, 2 sizes below the point where the US count rolls over to US 1.
Size Chart EU US UK CM 30 11.5 10.5 18.5 31 12 11 19 32 12.5 11.5 19.5 33 13 12 20 33.5 13.5 12.5 20.5 34 1 13 21 35 1.5 13.5 21.5
Frequently Asked Questions Does EU 33 round up or down in US? Round up for growth, but do not read the coming US 1 as smaller: it sits one length above US 13, and foot length, not the number, tells you which is bigger.
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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.