This is the Halo 4 Forerunner Mantle. I modeled it in Sketch up mostly for my own use, but feel free to download it for yours. I tried to get it as close to the original as possible, I'm kinda a noob at design software. It is around 6 3/4" in diameter, and like 3/8" tall? I don't remember, but it was supposed to be lol. I was/am using it for a Helmet Stand as the bottom plate. Please Enjoy! :)Built entirely from scratch in Sketch Up. Literally laid down a flat circle, drew all the details on and then started the extruding/chamfering/etc. process. It probably took like 3 hours or so, lot of tedious work, especially since I'm a massive novice with the software. After it was done, I exported it out to netfabb and adjusted the size and fixed problems for printing. Then re-exported it in STL format for shapeways.com.