This is a Japanese Shitajiki.
Shitajiki otherwise known as pencil boards are 10x7 thin pieces of plastic used to place under a piece or paper to improve the writing surface.
Highly collectible in Japan and rarely available outside, they are only sold during the release of the film.
Mainly they come with different manga and anime scenes.
#shitajiki #spiderman #doctoroctopus #marvel