Typically, an 18 cm measurement in children's shoes corresponds to a US size 10 for toddlers. It is always best to refer to the brand's specific size chart as sizing can vary between brands.
6
Ralph wears a size 18 shoe.
big show wears a size 18 shoe
Fiji shoes size is the SAME at the UK Size
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Brian Zoubek, American 7'1'' basketball player, wears a size 18 (US) shoe.
18
According to research, he wears size 19.
Andrew Bynum generally wears size 18 shoes.