Attached are the pictures of the Humbler.  If you
print them out on 8 1/2" X 11" paper you'll have a
full size pattern.  The line on the top view is the
center line.  The Humbler is symmetrical about that
line.  The easiest way to attach the two halves of the
Humbler is by using a "T-nut" in one half and a screw
(I use an eye bolt that can be used for attaching
other things like wrist cuffs).  Use at least a
1/4"-20 T-nut/screw/eye bolt.  If you really want to
get fancy...you can use a concealed hinge to attach
the two halves like this
(http://www.hardwaresource.com/Store_ViewProducts.asp?Cat=162)
The line at the top of the top view is where I put the
hinge.  You'll need some kind of latch to lock the two
halves together if you use the hinges.  The total
length is about 16" long.  Depending on how
tight/loose your (or whoever you plan to use this on)
scrotum is...you may want to modify the center curve.

Good Luck.  Let me know if I can be of any further
assistance.  I'd love to know how it works out for
you.