Announcing Cotton Spandex Jersey!
I used the proportions from a marvelous poster available at Space.com here. The poster is full of fascinating information, much more than just the scale of the earth from it's highest to lowest points. If the link doesn't work try going to space.com and find the link for the store, then search "Our Amazing Planet From Top to Bottom"
See this design in half brick here
What we do and how we do it.