These are 40 flake stickers of Sanrio Characters:

Hello Kitty, My Melody, Little Twin Stars, Cinnamoroll.

Sanrio 2018.

Size of the stickers is about 1/2 to 2 1/4 inch, mostly around 2/3 to 1 1/4 inch

The stickers are made of special washi paper.

You will get the stickers shown on the picture.