Raspberry Pi Zero
The Raspberry Pi Zero is only half the size of the Raspberry Pi Model A+ and opens new doors for mobile projects! It is the smallest Raspberry Pi currently on the market.
It is 65mm long, 30mm wide and only 5mm high. The Pi Zero uses mini connectors to save space, and the 40-pin GPIO header is unpopulated so you can choose which type of header you solder onto the board depending on what your project needs.