With every Vileda drying rack comes just ONE sock hanger with 10 slots (which is a bummer, not a single person will ever have only 10 socks/panties).

My version has 11 slots, which are a little bit more tight so that they can hold thinner materials like women underwear. It snaps perfectly to every Vileda drying rack. 

This way you can have as many socks and you wish!