This is a triskadecagonal bipyramid with one side rotated 1/26th of a circle relative to the other. The pyramids have been truncated, slightly, and each flat end has a 2mm hole that opens to the interior, which has been hollowed in order to save printing costs.

Each face has a single upper case Roman letter intruded into its surface. The areas of the letters have been measured and the weight removed from each face normalized by adjusting the depth of the intrusion such that an equivalent volume is removed from each face. This die, unlike other alphabet or letter dice on the market, has an equivalent chance of producing any letter of the English alphabet. There are no duplicate letters or "null" faces.


IN: 1.161 w x 0.85 d x 0.849 h
CM: 2.948 w x 2.16 d x 2.156 h


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No worries what so ever .. I ENCOURAGE people to copy / modify / use my designs ( ... especially for Shapeways ... as it allows me to acquire a more permanent version (mine are #80 cardboard) ... once again .. thanks for doing this :)
October 27, 2010, 10:46 am
And, to clarify: I'm quite comfortable admitting that you arrived at this design before I did. If you are, in fact, the first person to ever conceive of it, then historically it's "yours." That's fine: It's your design. But I also want to be clear: I had never seen your design or another one like it before you posted the comment and links above. I Googled around rather extensively looking for a die on this pattern before going to the trouble of designing my own, and at that time, which was several years ago, I did not find yours. If I had, I would've cited or acknowledged it. What I would not have done is simply copied your design and claimed it was my original work, so please don't think that's what happened. This shape is a fairly straightforward analogy to a D10, so it's not hard to believe that two bright folks who meditated independently on the problem would arrive at the same solution. In fact, I find it unlikely that no one would've thought of it before 2003, but until someone advances evidence to the contrary, yours is the credit. Thanks for ordering and commenting, and I'm sorry if I sound defensive or argumentative. I just want to make it quite clear that I don't knowingly rip people off.
October 27, 2010, 12:32 am
OK, if you insist, but I got there completely on my own. The backstory is here:
October 27, 2010, 12:15 am
Thank you for modeling my design ... ... I first released this back in 2003 ... so that one year later ... it could not be patented (at least in the US) .... I received my copy of your model (also in Alumide) and will be adding you to the artists on my Shapeways page ( ... Once again .. thank you for 'solidifying' my design :)
October 26, 2010, 11:40 pm


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