This wood shadow box does not have glass or plexiglass. The exterior measurements of this large shadow box frame are 10.75" x 13" x 2.25" deep. the interior measurements are 8.5" x 11" x 1.75" deep. The shadow box frame is solid pine and the back of the box is pine plywood. This shadow box is perfect for painting and will work great if you want to decoupage on a picture or piece of scrapbook paper. The wood can easily be painted or stained. If you are looking for a large shadow box that does not have a glass enclosure, this is perfect for you.