Dice Box, holds 14 standard sized dice (or 13 dice and an inspiration token), one standard 28mm mini, and a pen / pencil. Magnetic closers, 17.2mm circular magnets from Amazon.

https://www.amazon.com/gp/product/B018ITTFDM/ref=oh_aui_detailpage_o06_s02?ie=UTF8&psc=1

The product description states that they are 18mm, but they're not.

Also took a little sanding to get the top and bottom to loosen up. Right off the print bed, they fit together perfectly, but so tightly I had to use a screw driver to pry them apart.