MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I designed this for laser cutting with a 3mm (1/8in) material in mind (wood or acrylic).
5mm should also be ok, if not, just increase the drawing a little bit more.
If you intend to use 3D printing, maybe 2mm to 4mm thickness (a simple extrude of the vector drawing should be enough to transform this in a 3D printable file).