From https://www.sparkfun.com/products/12842:Beaglebone Black Enclosure - Clear Plastic
Description: The Beaglebone Black is a great credit-card-sized development platform with a fast growing community, why would you not want to keep your board safe and sound inside this clear plastic enclosure? These cases protect your Beaglebone Black from things like rogue wires that might short it out while still allowing full access to the board! Simply snap the BBB into the bottom half of the enclosure, then snap the two sides together.
As you may have noticed, these enclosures are actually transparent. The enclosures are perfect for letting you see your Beaglebone and make any needed adjustments easily.
The enclosure provides slots to access each header, USB ports, power jack, ethernet jack, power buttons, MicroHDMI, MicroSD card, as well as feet and vents to ensure the board gets proper cooling and slide-in wall mounting slots. All of the status LEDs on the Beaglebone Black are visible through the case thanks to light pipes embedded in the design. This is a really durable case that will do a great job protecting your Beaglebone Black!
Dimensions: 10 x 6.5 x 3 cm