Originally Posted by
Quilt30
I buy it by the roll. 42" wide by 20 Yds. The type comes in various widths in roll and sheets in sizes larger than letter size. I also get the gridded desk pads which are about 18"x24". I sometime use easel chart pads gridded in 1/2" and inch if I don't want precision.
Look under: drafting vellum
It is more eraser friendly than regular paper.