Build Platform Envelope Resource
thingiverse
If you're similar to me and concerned about your design fitting on an "X" (using Blender), check out this helpful resource. It's also a great point of comparison. Information sourced from makerbot.com and http://www.3ders.org/3d-printer/3d-printer-price.html.
Download Model from thingiverse
With this file you will be able to print Build Platform Envelope Resource with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Build Platform Envelope Resource.