JSS Swimming School Recommended V-Fin VF20-3 It says it's for 23-24cm, but I used it when my shoe size was 19.5-20cm. I've used it about 10 times. There are no major noticeable scratches or stains, but there are minor scratches and markings from use. Please understand that this is a used item inspected by an amateur and stored at home, and that it has been worn by a child before purchasing.