I print out my hexagon shapes from incompetech.com. The link will take you right to Hex graphs. You can print out any shape in any size. It's pretty nice. I use hexagons that are 1 inch on each side, this makes them 2 inches across. I also use what ever scrap paper is around the house to print them. I think it makes it a little more interesting to look at, and its green!
Joining the hexagons: