Knuts are the smallest form of Wizarding currency. They are made of bronze. There are no knuts on Pottermore, as all items are priced in Galleons.

From the Story

"Bronze Knuts are the smallest unit of wizard currency. There are twenty-nine Knuts to a silver Sickle and seventeen Sickles to a gold Galleon."

See also

Community content is available under CC-BY-SA unless otherwise noted.