Summary

This is a sheath made for a whittling knife whose blade is 78.5 (L) x 15.5 (W) x 2.0 (D) mm. The opening of the sheath is 16 x 2.5 allowing easy insertion, but the cutout tapers to 2.0 mm toward the tip so that it would not easily fall off the blade. The exterior design clearly indicates the direction of the blade to prevent accidental cut while removing the sheath.

The thing measures at 90 x 26 x 5 and can be printed without support standing on its end (as posted).