A 210 mm foot is the smallest size the women's grid carries, below where most European ranges begin and into territory shared with older girls' shoes.
CM to EU conversion
Converting centimetres to women's EU adds 13 to 15, the increment rising because EU numbers do not match millimetres one to one. So 23 cm reads EU 36 and 27 cm reads EU 42, and a half centimetre of growth moves EU by a full point in some places and only a half in others. Since a European last runs longer than the foot, two shoes both marked at your centimetre length can still fit apart, so read the EU result as an opening bid.
At this size, CM to EU
One size up from 21 cm, EU moves 0.5 to EU 34.5 while the metric length rises 0.5 to 21.5 cm. Both 21 cm and EU 34 are whole numbers here, so nothing rounds. For 21 cm, the EU column here runs EU 34, EU 34.5, EU 35, stepping a half size at a time.
Foot length vs shoe length
A CM shoe size is your measured foot length, not the space inside the shoe.
Brands add 0.5 to 1.0 cm of toe room so your toes clear the front. Japanese cm
labels already include about 1 cm of it, so a JP 24.0 measures near 25 cm
inside; an EU number instead describes the last. That built-in gap is why
conversion tables disagree.
Why one foot length gives many sizes
Size Chart CM EU US UK 21 34 4 2 21.5 34.5 4.5 2.5 22 35 5 3 22.5 35.5 5.5 3.5
Frequently Asked Questions Does 21 cm round up or down in EU? EU 34, US 4 and UK 2 are all whole here, so a rounding choice is rare; when a foot sits between sizes, the larger one with a snugger lace beats a short toe box.
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Note Based on Mondopoint standard (foot length in mm) Women's sizing differs from men's by approximately 1.5 US sizes Heel height affects fit - measure standing Shoe sizes can vary by brand and style See a number that looks off? Report an error on this page.