Make your Pi a little slimmer with Low-Profile MicroSD Card Adapter For Raspberry Pi. 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, Low-Profile MicroSD Card Adapter For Raspberry Pi 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 or with use on our Pi Dish or VESA mount. It does not fit in a PiBow case, for certain. You might be able to build an Adafruit Pi Box around a Pi with the adapter inserted but it isn’t a good fit and the card can’t be ejected while installed and it’s not recommended to be used with the Pi Box. Other cases may or may not work, so be aware before assuming that this will work with your case.
Note: Micro SD Card and Raspberry Pi is NOT included.
Adafruit Product Page: https://www.adafruit.com/products/966