Poland’s biggest postal operator, Poczta Polska, has collaborated with CD Projekt Red to release a stamp featuring The Witcher's monster slayer for hire, Geralt of Rivia.

A limited print of 180,000 Witcher stamps began circulation on September 16, with each stamp valued at 6,00 PLN (NZ$2.13 / AU$2.07).

The stamp is 31.25 x 39.5mm and printed on fluorescent paper.

Poczta Polska will also release a Witcher "first day cover" envelope.