Arduino Proto Shield is open-source hardware! You can build your own board using the following files:
The Proto Shield bring the power from the Arduino standard 5V and GND pins to the two power bus rows placed between the Through Hole package footprint, which can be used for powering the DIP sockets, or for power and ground rows.
On the ICSP connector only 5V, GND and RST are wired tot the respective pins on the header. MOSI and MISO are present only on the connector.
For more information about the SPI communication see the SPI library
The maximum length and width of the Proto Shield PCB are 2.7 and 2.1 inches respectively. Three screw holes allow the shield to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.