Yep, that's about the only way using a house hold printer. For a few extra bucks you can go to a local kinkos or Fed-ex store where they will be able to give you both color and the right size on possible one sheet of paper. Just make sure you know how big you want to go.
I recommend WOW model viewer to size your weapons. A normal human assuming 6 foot is the base i use for cosplay props. Trying to size off a night elf or Gnome isn't going to help you with getting the right look.
Use the size of the human for a reference, 3 feet from top of head to waist and 3 feet from waist to feet. if it the weapon is half the length of a leg.... boom 1.5 feet long. Most daggers in this game are between 12-16 inches long and some fist weapons are as large as 2.5 feet!!
Size is important when doing wow props due to the over inflated nature of this items.
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What Would Pocket Do!!!