We print a lot of retail signs to go into 22×28 sign holders. A lot of people in the industry call them stanchion signs. You also see that mis-spelled a lot!
Stanchion signs are nice because they give you a nice size portable sign that requires no additional fixturing. Set them wherever you need them and drop the sign in, and you are off to the races.
One thing that people often misunderstand about them is the width of the slot top at the through which the sign must be inserted. The slot is really only about 1/8″ wide, and regular foamcore board, which is 3/16″ thick, won’t go in. We use a material called 50 point board for stanchion signs. It’s a lot like shirt board. With paper and laminate, the sign we make is about 1/16″ thick, and goes into the stanchion sign easily.
We can make these retail store signs either single or double sided, and with a gloss or matte laminate on both sides to protect the printing.
The actual sign holder can be purchased from a number of different vendors. They cost about $50 each.