Beware of Actual Tile Dimensions!
Although I haven't installed these tiles yet I'm going to give them a high rating initially because they appear to be a very good product that should work extremely well in my storage shed/playhouse. That said, the dimensions of this product are extremely misleading. They are advertised as 19-5/8 x 19-5/8. Please note this is the actual outside dimensions of the tile including the tabs... as if they were placed end to end without interlocking. Once you actually connect them the overall surface area covered is less. The linear dimension when assembled is approximately 19-1/4, which is the dimension from the solid edge on one side of the tile to the outer edge of the tab on the other side of the tile. For tiles on the end of the row the linear dimension is approximately 18-7/8, which is the dimension of the solid surface of the tile, assuming you want to cut off the exposed tabs at the end of each row. Hope this helps others avoid ordering too few tiles as it can really make a difference.