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The rowing men's four team have tweeted a picture of heading in to the Olympic village Post Office to pick up some of the stamps with their faces on.
There are also traditionally sized versions available.
Sophie Hosking and Katherine Copeland have said winning Team GB's fourth Olympic rowing gold was "like a dream."
The pair comfortably claimed victory ahead of China in the final of the women's lightweight double sculls final at Eton Dorney to take Great Britain's overall gold medal tally to 10.
A stamp to celebrate Team GB's gold in the rowing men's four will be will be on sale by lunchtime tomorrow.
The honour will be the first time Royal Mail has issued stamps on a Sunday.
Royal Mail will produce the stamp - celebrating Alex Gregory, Pete Reed, Tom James and Andrew Triggs Hodge's success - within 24 hours.
A fleet of 90 Royal Mail vehicles will deliver the stamps to more than 400 post offices by lunchtime tomorrow.
This is the ninth gold medal stamp to be issued by Royal Mail.
The parents of gold medal winning Team GB rower Katherine Copeland always believed their daughter would achieve Olympic glory.
Her mother and father Penny and Derek and brother Finlay were all at Eton Dorney to cheer her on today.
Pete Reed won Gold in this morning's men's coxless fours rowing:
Katherine Copeland and Sophie Hosking moments after their gold medal win and below Alex Gregory, Tom James, Pete Reed and Andrew Triggs Hodge with their gold medals.
Mark Hunter said: "We gave everything, we tried everything, we wanted to win so badly, sorry to everyone we've let down."
Zac Purchase: "I just wish we'd been a little bit quicker for everybody here."
Great Britain's Zac Purchase and Mark Hunter have won the silver medal in the restarted men's lightweight double sculls, missing out in the closing moments to Mads Rasmussen and Rasmus Quist of Denmark who took the gold.
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Super Saturday got off to a sensational start as Britain's rowers claimed two golds and a silver.