In working on the design for my octagonal glassebo, I found that I wanted to draw a full size joint for best visualization, and ultimate transfer to a template.
I'd been working on an 8.5 x 11 gridded engineer's computation pad.
A quick cruise through Staples, and voila! A Staples Stickies 25 x 30 easel, and... it's gridded with 1" grids! Just what I was looking for.
If you ever need to make a large drawing of something, this seems like a good way to go.