This is a dice carrier that doubles as a dagger (a big dagger, almost a small sword). The handle slides into the blade/cross guard half.

The handle is 6.3" and the blade is 8.5". The overall length of the assembled dagger is 14.575".

The handle is a longer than it needs to be for a full D&D set. When you slice it, you could remove up to 0.5" for a more tight fit. 

In Dice Handle 2.2, I have four triangles so I could print it upright. I printed the blade upright as well, both on 0.1 layer height and 60 mm/s. Then I cut off the triangles and wrapped the handle in electrical tape.

Dice Handle 2.1 has no triangles and can be printed in any orientation.