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I can't remember. I got real close to 1/8" x 1/8", but it was always slightly off when I printed it. To get complete control of the dimensions I print-screened it and pasted it into Microsoft Paint, where I could skew the grid infinitely until it printed perfectly square.
So, the grid is really a .jpeg picture. It sits on a worksheet in Excel and I draw over it.
Not sure I'm explaining this well...
Posted from my iPhone/Mobile device
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