Interesting. There was slightly more gap when tiles went back into tray. Same number of tiles, but some ended up slighly smaller.
Just 1/8 inch all the way around outside amounts to almost 8 square inches. So if they were 1inch square,3 square inches. 3 square inches divided by the number of tiles is .0476 inches. Thats reducing outside measurement by 2mm. Hard to catch.