These are the "Nerd Block Vinyl Stickers".
Whatever the Nerd Block is, has decided to produce some fairly large vinyl instead of the usual paper/type stickers. They choose getting ready to run classic Sonic, neoclassic fists-together Knuckles and neoclassic waving Tails. There's also the 25th Anniversary logo with fully shaded Sonic in the winged ring/with banner there as the 4th sticker.
These may have been a part of some 'loot box' or prize thing of some sort. It's unknown if they were sold on their own or how much/where it was.
Additional Info
- Region: America
- Brand: Nerd Block