14x11cm portable Raspberry Pi Zero W with 3000mAh Adafruit powerboost 1000, Hyperpixel 4inch display, a keyboard and a4 port USB hub.

See the build blog, videos and parts list here: https://assadollahi.de/pocketpi/

Woah! Featured in:
hackaday: https://hackaday.com/2019/05/16/pocketpi-is-exactly-what-it-sounds-like
hackster.io: https://blog.hackster.io/pocketpi-raspberry-pi-zero-w-keyboard-computer-is-an-iterative-success-981821d46c48