This easy-to-assemble unfinished kit is ready to paint or stain. The lower section, both inside andout, is solid. Other features include: pre-assembled panels, Plexiglas™ roof and windows, open back. It could be a greenhouse, sunroom, garden room,or a building of its own with two placed back to back. 11 3/16" W x 13 1/2" H x 11 11/32" D