A high school has stopped a student from wearing crocs as school shoes.

A woman bought a pair of plain black crocs for her son, who attends Whangarei Boys' High School, after the roman sandals she initially purchased fell apart within a few weeks.

Principal Karen Gilbert-Smith says they don't comply with their uniform policy.

She says they don't change their uniform policy every time something comes into fashion and it already has enough flexibility.

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