A very compact dice box that offers room for 18 "standard" dice of [D4, D6, D8, D10, D12, D20], a miniature, a pencil and a rubber.
I used some felt and glued it into the cap so it can be used as dice tray.
The neodym magnets are 5mm in height, width and length and hold the two box pieces together.
I added measurements for the felt template as an image above ;)
A printable version of it is in work.