A nice little (3D printed) card holder that holds 4 micro sd cards! You can attach it to your key, backpack, or put it in your pocket! To open it just pull on the side with a half circle.

The size is 2.5 in. long, 0.6 in. wide, and 0.09 in. tall.

Note: It does not come with the micro sd cards.

WARNING: Some micro sd cards are sized differently by fractions of a millimeter. Some cards may be a little loose or a little snug but it should work for what you need.