Nanoblock - Street Fighter

Nanoblock @ Otaku House

The Nanoblock is the smallest brick in the world! Developed by Kawada Japan and are inspired by Lego bricks, the Nanoblock has the smallest brick size of 4mm × 4mm × 5mm. 

The underside of the bricks are different from Lego bricks because they use a dividing flange, known as the double-ridged backing system, instead of the tube system that Lego employs.

These are official Nanoblock from Japan.