Very big.
Anyway, I placed
64x cubes on each corner of slate, a
red 8x cube at 0, 0. Later I added
3x3 64x baseplate square for an overhead view. I also adjusted the visibility distance so I could see that far!
0,0 to one corner: 10,137 bricks
Corner to corner: 14,336 bricks
0,0 to edge: 7,168 bricks
Area of slate: 205,520,896 bricks²
And Ladios, remember when you covered slate in 64x baseplates? That means you layed 50176 baseplates.
View from 20,000 bricks high, click for better quality

View of all 4 corners

View from corner to corner of opposite polarity

View from origin to corner

View from origin to corner
