What does “dubbel” mean in Dutch sticker collecting?

In Dutch sticker-collecting culture, dubbel shifts quietly from adjective to noun the moment you hit the playground. Als mensen dubbel hebben — “when people have a double” — means they own a spare copy of a sticker and are ready to trade it. Dictionaries list dubbel only as “double/duplicate,” but every Dutch schoolchild uses it as a noun: ik heb een dubbel, “I’ve got a spare.”

The plural dubbels is just as common — ik heb tien dubbels — and the whole swap economy of the speelplaats (playground) runs on it. The clip shows kids trading Panini World Cup stickers under a strict one-for-one rule: both sides must be happy with the exchange, and no two stickers for one. The key trigger for any swap is that first question: heb jij dubbels? — “do you have any spares?” The same word travels with the hobby into adulthood: Belgian and Dutch collector sites like mijndubbelsruilen.be use dubbels as their central term.