My prefered medium for tracing patterns are simple laminating pouches. Inexpensive, available in rather large format (42 x 30 cm in my case). Simple tear the front and the back apart and you get to sheets for your tracing. I use a fine permanent marker - if you want, you can use different colors for different parts of the image, i.e. black for the cuts, red for sections to be shaded etc.
And besides, I can use them over and over again.