Art Panel picture frames work great on Ampersand painting panels, but they can be used on any panel that is 1/8 to 1/4 inch thick. The sizes listed are the panel sizes. We cut the frames so that they have a bit of reveal around your art, typically 1/8 to 3/16 inch. These are solid wood frames. Order in bundles and save 25% We suggest that you hold the art in these frames either by Velcro or with small dots of glue. The Velcro is great when it is necessary to switch out the paintings easily, such as at an art show.