Popular Post Cap Sizes

A Newport Pyramid Post Cap by Deckorators sits on a 4x6 post in front of a blue gradient background

DecksDirect is the nation's largest stocking dealer of deck products. That can mean a lot of options to sort through! Here are our most popular post cap sizes to help you find the one your deck needs. Choose from a multitude of materials and styles to find yours.

What Size Post Caps Do I Need?

You will need to measure the outside dimensions of your post. The best post cap opening size is going to be 1/16 inch to ⅛ inch larger than your post. The most common post cap sizes are 4x4 inches and 6x6 inches.

Watch this quick video and if you are still unsure about what size you need, or you can give an expert at DecksDirect a call at 1-888-824-5316. We would be happy to help you find the right post cap for your deck or railing!

What Is a Post Cap?

A post cap is made to protect your post from the elements, but they also present a great opportunity to let your unique style shine. You could also illuminate your space with a Post Cap Light. There are endless options of post caps in different sizes, styles, and brands.

How Do You Install Post Caps?

Post caps will come with different installation instructions. Generally, they will come with color-matched installation screws or standard Silicone Adhesive can be used to attach the post topper to the deck post.

If you are having a hard time getting your post cap to fit around your post, and it's hot and humid where you are, your post may have expanded. You may want to wait until a cooler and drier day to install your post caps.