Adding a prototype circuit to a Raspberry Pi can make a tidy enclosure unexpectedly tall. This board uses press-fit header contacts instead of a stack of bulky female headers, aiming to leave more room for components under a lid.
Its outline makes use of the available space around the Pi, with 288 prototyping positions on a 2.54mm grid. The holes are not pre-connected, so you choose the routing with component leads and wires.
See the product page below for supported form factors.