MbientLab's USB Cube Case/Enclosure (Lower half) to fit your MetaWear Smart product board available at www.mbientlab.com/store. The enclosure fits a 26mm x 17mm x 5mm MetaWear board with a lithium battery attached. This case has a slit for the micro-USB header to recharge your MetaWear board.
You may want to resize this case before you print it so it fits your project.
You will need the USB Cube Upper 915 part to mate with this part.