This tee is only sold at Forever 21 stores!
This is a women's sizes tee (so, could maybe fit anyone) and it's called the "Sonic Tunnel Tee". The graphic has perspective grid lines in black on the white shirt background to create a square 'tunnel' that looks like it goes through the shirt. The characters are also drawn at different sizes to enhance the perspective and try to make it 3D & different. (It works, no other shirt uses this effect) Sonic is running in front, Tails is flying after, Shadow is shown (unusually!) hover-skating along & Knuckles is running in the back. There's Japanese text at the bottom that spells out "Sonic the Hedgehog" in a simple line font.