The nRF51822-4 module is small, and so this is a small breakout board to go with it. It adds an LED, which is controlled by one of the pins. It provides through-hole pads for 5 of the available pins, and uses SMD pads for the two remaining pins.
This breakout board measures 11.40mmx16.71mm
For ease of programming, the board includes a 10-pin IDC connector.