That's right, stamps! Why not?
Bpost have released a set of five stamps with pretty standard artwork of Sonic, including some with Sonic grouped up with Tails, Shadow and Amy. is this the first time Sonic has ever been seen on a stamp, excluding eBay bootlegs? Either way it's interesting to see what a push Sonic's 20th anniversary is getting. Spotted this on Tumblr via
Albotas.