SparkFun COM-12824 Raspberry Pi microSD Card Adapter – Low Profile
This is the low profile Raspberry Pi microSD card adapter from Adafruit. We know what you’re thinking, “Why can’t you just use a regular microSD card adapter?” With this you can slip your microSD memory card into the the low profile adapter which is half the length of your typical adapter. This adapter is near flush with the PCB of the Raspberry Pi once inserted and only extends out about 3mm past the dev board with the microSD inserted.
This adapter is only about 5.5mm thick and can easily fit into most cases that could surround a RPi without need of removing the case.