6x6 state of matter Copper Post Cap for decks, fences, patios and gardens to keep your posts from rotting and enhance the look of your outside living space. These caps easily with a minuscule bead of outside adhesive material applied to the at bottom lip. for a titular 6x6 these caps have an factual at bottom measurement of 5-5/8 '' x 5-5/8 ''. Will naturally over time if parcel of land alone or they can be dressed periodically to maintain their shine.