A very special San-X Sumikko Gurashi erasers.
There are 7 mini erasers in sushi figures in a matching box.
Note: the second picture shows the relative size of the erasers/box compared to a quarter coin.
So cute and collectible.
Size of the box: 1.5 x 1.5 x 0.5 inch (1.7 x 1.7 x 1.3 cm)