Make your Pi a little slimmer with this microSD card adapter board. It slides in where the SD card goes but is half the length. Pop in a microSD card for a sleeker machine. The microSD card holder is a push-push type so you can push on the edge that sticks out to remove the card when necessary.
Depending on the case from various manufacturers, the microSD card adapter may not easily slide in and out or may need modifications to the PCB or actual case. The microSD card adapter is meant for a stand alone board.