What Size Boat Fender Do You Need?

Not sure what size boat fender you need? Check out this blog post for a helpful guide on picking the right sized fender for your boat.

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Choosing the right size fender for your boat is important for both practical and aesthetic reasons. Although there are many factors to consider, such as the type of boat, the amount of wear and tear it will experience, and the environment it will be used in, ultimately the decision comes down to personal preference.

To help you make an informed decision, we’ve put together a comprehensive guide on boat fender sizes. In this article, we’ll cover everything from the standard sizes to the more unusual dimensions, as well as tips on how to measure for a fender and what to look for when making your purchase.

Types of Boat Fenders

There are several different types of boat fenders on the market. The type of fender you choose will depend on the size and type of boat you have, as well as your budget. The most common types of boat fenders are inflatable, cylindrical, and conical. Let’s take a look at each type of fender in more detail.

Inflatable Boat Fenders

Inflatable boat fenders are by far the most popular type of fender on the market. Their popularity is due to a number of advantages they offer over traditional foam or plastic fenders. Inflatable fenders are much more versatile, since they can be deflated and stored away when not in use. They also offer superior protection against impact, since they are designed to absorb shock. And finally, inflatable boat fenders are much more comfortable to lean against when boarding your vessel.

Foam Boat Fenders

Foam boat fenders are the cheapest and lightest weight option on the market. They’re popular among small boat and kayak owners because they’re easy to handle and store. Foam fenders are also popular as a second layer of protection for larger vessels. They can be used on their own, but they’re often used in combination with another type of fender, such as a vinyl-wrapped fender or an inflatable fender.

There are two types of foam boat fenders: closed-cell and open-cell. Closed-cell foam fenders are more durable and have a higher density, so they’re less likely to be punctured or dented. Open-cell foam fenders are lighter weight and more affordable, but they’re not as durable.

If you’re looking for a cheap and lightweight option for your boat, foam boat fenders are a good choice. However, if you need a more durable solution, you may want to consider another type of boat fender.

Polyform Boat Fenders

Polyform boat fenders are made in the USA from PVC vinyl compound. Their construction process involves a pressure-molding process that ensures each fender is identical in form and function. The marine-grade vinyl cover is UV and abrasion-resistant. The fenders come in a variety of colors, including white, black, blue, green, and red. Polyform fenders have a 5-year warranty against material defects and workmanship.

These fenders are designed for use on boats up to 50 feet in length. They are available in six different sizes, ranging from 6 inches to 18 inches in diameter. The Polyform G Series is their most popular line of boat fenders. These fenders are available in white, black, blue, and green. They come in three different sizes, ranging from 6 inches to 12 inches in diameter.

How to Measure Your Boat for Fenders

The size of the boat fender you need depends on the length of your boat. You will also need to take into account the weight of your boat, the type of hull, and the type of water you will be using the fender in. Here are some tips on how to measure your boat for fenders.


To find out how long your boat is, measure from the tip of the bow (the front of the boat) to the stern (the back of the boat). This measurement is your boat’s Overall Length (LOA). Once you know your LOA, you can start shopping for fenders.


One of the measurements you’ll need to take when choosing fenders for your boat is the beam, which is the width of your vessel at its widest point. To measure the beam, start at one side of the boat and measure straight across to the other side at the midpoint of the vessel. You can also measure from rubrail to rubrail if your boat has one.


Now that you know the different types and sizes of boat fenders available, you can make an informed decision about which fenders are best for your boat. Keep in mind that you may need more than one type or size of fender to properly protect your boat, so don’t be afraid to mix and match!