This is a full size breadboard with 840 tie points. Good for small and medium projects. It is 2.2" x 7" (5.5 cm x 17 cm) with a double-strip in the middle and a power rail on each side. You can pull the power rails off easily to make the breadboard as thin as 1.4" (3.5cm). You can also "snap" these breadboards together to make wider breadboards for bigger projects.