That would be awesome! I'm thinking 12'6" from center to center of each post in width and 14' from center to center in depth. 6" timbers. Does that make sense? Here is my guess at a parts list:

4 - 6x6x10'
2 - 6x6x16'
2 - 6x8x16'
12 - 3x6x16'
4 - 4x6x8' - braces

I'll take ANY suggestions on these sizes. The wife really likes the pergola in the picture below but I have no dimensions so I'm making guesses on some of this. I've built a pergola before but it wasn't a Timber Frame. The upper pic is of course the Timber Frame and the lower pic is the one I built. The new Pergola will be at ground level.

Thanks,
Shay