Put out their shoes, clogs.
there shoes
They put out their shoes. I think I remember reading that Dutch children put out wooden shoes with hay in them for the reindeer!
They usually put up shoes
you put you shoes out on the 5th of December
Before stockings, the French used leg coverings called garters or hose. Garters were bands worn around the leg to hold up socks or stockings, while hose were close-fitting garments covering the leg from foot to waist, usually worn by men. The evolution of fashion eventually led to the adoption of stockings as leg coverings in French attire.
Holland And this is done on 5 December well before Christmass. See the link below for more.
My guess is clogs.
Hang the stockings or put out the shoes on the evening of December 5th so when the children awake on the morning of the 6th, they find their stockings/shoes filled with candy and small toys.
shoes
Nothing at all! Santa Claus does not come to Dutch children, so they don´t need the stocking. They get presents on December 5th from a Santa-lookalike called Sinterklaas and he puts presents in shoes
We Dutch have our own Santa who comes end November. He places gifts in the children's shoes which they have put besides the radiator or fireplace. If we give each other gifts during Christmas we put them under the Christmas tree.