This is called the "Game Icons Sonic Tee".
It's a Bio World item appearing in Winter 2019. Does it seem familiar? It might...because this sort of thing has been done before on notebooks as well as shirts. What's a little odd is that it doesn't seem to actually use any real icons from a game. It has a Sonic face, a silouhette in a diamond shape, 1 ring, some squares, a lightening bolt?, a logo, and an "S" on a shield. These are all scattered around modern jumping-twist Sonic on a cobalt blue tee.
What's odd is that the games are actually full of real icons they could have used like 'speed arrows', extra life icon, Chao things, Eggman's stuff...the list goes on. It's an all right tee, if you didn't have anything like it already. This is likely to be an Amazon item.