Squexagons is a marvel of ingenuity. It's a hex grid overlaying a square grid (actually slightly rectangular, as squares do not line up with hexes correctly). In this package you get a small hex (1/4 inch/6.75mm) page and a large hex (1 3/16inch/30mm) page, as well as sample map of a small restaurant. Both pages come in color (blue hexes overlaying a red rectangular grid) and black & white. The small black & white page gets a little muddled, as there is no variation in shading between the two grids. This is a minor quibble which the color page more than makes up for.
I would have liked to have seen a 1 inch/25mm grid page. You can always scale the existing pages though this leaves a lot of white paper (30mm scaled down) or you end up printing a lot of duplicate pages (6.75mm scaled up). All of the pages are in A4 format with no option for US letter (if you scale the 30mm page to 25mm it brings it down to below US letter anyway).
This is a great little product that fills a niche for those of us that like to use hex grids with our rpg's or table games. You have to draw your own maps or you could print this on transparency sheets to use as an overlay for your existing maps and tiles.