[Gangchen_gonpo]

I have been making signs for sometime and you can also pick 3'x4' sheets of the foam insulation from an office supply store.

Some kinkos have the enlargement machine that takes a 8.5x11 and turns it into 3'X4'. I just take a paper copy of Word or whatever file and make a large copy.

Glue sticks work fine to keep it attached.

Here are some examples:

[jennyp]

If this is purely a one-shot, temporary kind of thing, I'd suggest going with the Kinko's-type route, as others have suggested. Stick to card stock in that case, as anything more is overkill unless you need a seriously big sign.

This is pretty much a temporary thing. It's looking like a blowup copy from 8x11 to 3'x4' over Office Depot foam core. In that case, do you still recommend card stock?

Gangchen_gongpo, is that the standard stock when Kinko's blows up an 8x11 to 3'x4'?

Thanx everyone, this is great info!