Tredegar cyclist Mark Colbourne won gold in the C1 individual pursuit this afternoon.
The stamp will go on sale within the next 5 days and a post box will be painted gold in his home town tomorrow.
Royal Mail says the seven post boxes in Wales painted gold to mark Olympic and Paralympic triumphs will remain so permanently.
Hundreds of people turned out, as Paralympic cycling champion Mark Colbourne was given the freedom of his home town.
Paralympic hero Mark Colbourne will be welcomed back to his home town today.