The outermost tiles are 1" x 4". Then, you have a smaller border of 1" x 6" tiles, and in the center are 1" x 4" diagonal tiles.
By Lee Wallender, About.com Guide
The outermost tiles are 1" x 4". Then, you have a smaller border of 1" x 6" tiles, and in the center are 1" x 4" diagonal tiles.
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