I bought two stand-up sign holders by OfficeMax for a public event related to my part-time business. I needed something to display our logo and basic product info, and these sign holders turned out to be exactly what I was looking for. They measure 11 inches by 8 1/2 inches, which is the size of regular business paper. The sign holders are made of clear plastic; a paper sheet with whatever informaiton you need to display is easily inserted into the holder, and then you just put it up on a desk or anywhere else facing your customers. The sign holders are available as vertical and horizontal, or portrait and landscape if you prefer MS Word terminology. I bought one of each since I had ideas for both types of signs.
The sign holders work very well. I appreciate their convenience, ease of use, and I like the professional look they give to my displays.