Perspective view (picture courtesy of Alea Kybos)
The shape of this D18 was designed by AleaKybos. Each face has an opposite face which is parallel.
Check this applet
. Set Points=18, select "PackAnti" and then click on "Make Dual" to see the underlying polyhedron. This die is the result of the intersection of this polyhedron with a sphere of the appropriate size.
2.188 w x
2.128 d x
0.861 w x
0.838 d x