These cases provide protection for SD Cards. And, perhaps more importantly, I find they make the SD cards less likely to disappear in a pocket, purse, backpack, or pile of stuff. The finished dimensions are approximately 48 x 35 x 8 mm.

There are three types of bases: A) SD Card; B) Micro SD Card; and C) Micro SD card with its Adapter.

The Lid fits each of the bases.

The hole at the end of the case allows it to be hung on a nail or hook; or it can be clipped to a lanyard.