I've opened some of the sample images and I honestly can't tell the intended size. The central tiles are square, and the outer pieces are rectangular, so they are not consistent there. Also, the cover says "(70px)", but if you dived the size of a square tile by 70, you come up with 42.857 squares per tile. If you set them to 40x40 grid units, the pixels per inch become 75, which again, is not intuitive or easy to work with. Gauss' method is probably the easiest solution. I would suggest setting the page size to the suggested dimensions and then turning the grid off before sizing or placing. Grid snap will frustrate any attempt to get these to fit. Once they are in place on the map layer, try not to touch them, if you later turn the grid on. The top and bottom row are all shorter than the central squares. The left and right columns are all wider. You can probably get the dimensions you need by downloading A1, A6, F1, and any center square. A1 will get you top row height and left column width. A6 will get you right column width F1 will get you bottom row height Center squares will be same for all and can be used for width of the 4 center tiles in the top and bottom rows I would also strongly advise against trying any kind of dynamic lighting on a map this size. If you need to hide things, go with the GM layer, or Fog of War.