Have a sign professionally made by a sign maker unless you’re proficient at word processing and layout. The sign can be as small as 8 1/2 x 11 so long as it can pleasingly accommodate pertinent information in lettering large enough to be read easily from 4 feet away. You might choose a bright color for more impact.
I’ve gone through many revolutions for my tradeshow booth. I started with an 8 1/2 x 11 stand-up flyer that listed the benefits of being in Elite Leads. Then I went to using an easel. I had my local sign maker create a 24 x 48-inch display of the benefits. Then I found a resource for 4-panel folding tabletop displays that is very reasonable. I had my logo, website homepage and benefits list laminated and placed on the panels. It’s easy to carry and set up, and it looks much more professional. There are collapsible retractable banners from a size that sits on the table to being larger than life. My next step is to purchase a pop-up booth with display lights and pre-printed panels. Most of these products can be found very reasonably on ebay.com.