Actual size is 2.0 by 0.7 inchThe Teensy++ USB Development Board is a complete USB-based microcontoller development system. Only a standard Mini-B USB cable (sold separately) is needed to connect to a PC or Macintosh.This version has solder pads for all I/O signals. The Teensy is also available with the header pins to plug directly into a solderless breadboard.All Teensy boards are shipped