Nantucket Post Caps are sized according to the actual physical measurement of your post. All caps are made 1/8" larger on the opening than the actual post size you specify. For example, if your 4x4 standard post truly measures 3-1/2" x 3-1/2", choose that size and your cap will come with an inside measurement of 3-5/8" x 3-5/8" to allow it to slip over your post.
||Cambridge Slip Over Post Cap
||Black, Copper, Pewter, Stainless
||Nantucket Post Cap
||3-1/2" up to 10"
|CA Proposition 65 Warning