Okay, this model was made by accident, but it worked out! I was looking for something to display my MGSD Gundams , so I tried this out. It took a while, but overall, it looks sick. Alright specifics for dimensions I used the basic frames from Michaels, 11x17 ones. Now for the width, I used 8x11 ones found on Amazon.

Now, if you want to make your own, all that matters is that its length is at least 11 inches, and its width is at least 8.