The quick and inexpensive way to post messages outdoors along trails, shelters, buildings and more. Create your own posters or use standard posters. Protective lens helps weatherproof message. Rigid frame is made of structural premium plywood—protects against moisture and insects similar to marine plywood. Frame dimensions: 22"H x 14"W x 0.5"D. Protective lens: 21.5"H x 13.7"W.