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[]
- Knuts on the Harry Potter Wiki