Shinsei Kamattechan Child Illustration Can Badge Limited Rare

This was a limited edition item sold at a solo live performance by Shinsei Kamattechan at LIQUIDROOM in the summer of 2013.
There are 6 items available.
The top-left item has been used a few times. There are small scratches on the surface.
The others are unused, but as they have been stored for a long time, the outer bags are not in pristine condition. Please understand.
The sizes are approximately 4.5cm for the small ones and 7.5cm for the large ones.