Take them from the children.
If you keep your eyes open, you can find well made children's wooden art easels at any family garage sale, Goodwill, etc for $5.00 or less. For table top art displays, you cut them down, for larger easel, you add to them.
For displaying my relief sculpture, I add a front panel of 3/8 inch plywood, slightly larger than the artwork. The ledge for the art can be as deep as you need it. The ledge and supports are glued then screwed from the back.
|Detail of ledge. These are working easels, you can see by the wear. Time to repaint.|
|Half round molding at top.|
To finish the look, and to keep the plywood from warping, I add a half round molding at the top. Paint all your new easels a quiet color that looks good with your art. It's an inexpensive way to show your art at it's best.