Common sizes and dimensions of deck and fence post caps?
Deckorators®, the industry leader in post caps / post tops for decks and fences, offers many post caps in various shapes and sizes, but the most common sizes are 4x4 and 6x6, which are made to fit a standard 4x4 or 6x6 pressure treated lumber or cedar post.
What are the inside dimensions of post caps?
The inside dimensions of the standard 4x4 post top measure 3-5/8", and the inside dimensions of the standard 6x6 measure 5-5/8". Deckorators produces a limited selection of other opening sizes, such as 4-5/8", 4-7/8" and 6-1/8". In addition, Deckorators makes a 4x6 post cap (with inside dimensions of 3-5/8x5-5/8) in two all-wood styles - Newport High Pyramid and Newport Classic. They also offer a 8x8 copper-topped post cap with an opening size of 7-5/8" and a 10x10 cap with an opening size of 9-5/8". All of these special sizes are available in cedar and can be stained to match the color of your deck. Redwood 4x6 post caps are also available from Deckorators.
What are the dimensions of a standard 4x4 or 6x6 wood post?
The lumber industry defines standard wood post sizes as 4x4 or 6x6. The outside dimensions of the standard 4x4 measure 3-1/2" x 3-1/2", and the outside dimensions of the standard 6x6 measure 5-1/2" x 5-1/2".