The dimension of this breadboard is 16.5 cm x 5.5 cm. It has 2 power buses, 10 columns, and 63 rows - a total of 830 ties in points. All pins are spaced by a standard 0.1"(2.54 mm). It has a self-adhesive on the back and also interlocking parts, so you can hook as many together as you'd like.