3-Bow Bimini Tops for Protection and Shade on the Water

A 3-bow boat Bimini top is a folding canvas sunshade supported by three curved frame bows. It fits most runabouts, fishing boats, bass boats, and jon boats up to 103" wide. Every Seal Skin 3-bow Bimini top is 72" long; the difference is choosing height that fits how you use your boat and how you use it, as well as the width range that matches your mounting points.

Pick from three heights: a 36" low profile Bimini top for fishing and seated cruising, a 46" universal Bimini top for everyday family boating, or a 54" walk-through Bimini top for standing headroom. Each boat Bimini top is waterproof, UV resistant, and speed rated, and it folds down when you need open sky.

There are two tiers of Seal Skin Bimini tops you can choose between: Seal Skin Supreme , made from SEAL-TEC™ and boasting a lifetime warranty, or Seal Skin Elite with a 10-year warranty.

Choose Your 3-Bow Bimini Top Height

Height is the first decision when buying a 3-bow Bimini top because it sets how much headroom you get under the canvas. When choosing from the below options, be sure to measure from your mounting point, not from the deck; the frame height adds to however high your mounts sit.

Low Profile (72" Long, 36" High)

The low profile Bimini top sits close to the gunwale for less wind resistance and a clean, sporty look. It works best on smaller fishing and bass boats where passengers stay seated. Available for boats 50" to 96" wide.

[Fits 50"-60" Wide] [Fits 61"-66" Wide] [Fits 67"-72" Wide] [Fits 73"-78" Wide] [Fits 79"-84" Wide] [Fits 85"-90" Wide] [Fits 91"-96" Wide]

Universal Use (72" Long, 46" High)

The universal Bimini top gives seated adults comfortable headroom while keeping a moderate profile. It suits most runabouts, deck boats, and family fishing boats. Available for boats 54" to 96" wide.

[Fits 54"-60" Wide] [Fits 61"-66" Wide] [Fits 67"-72" Wide] [Fits 73"-78" Wide] [Fits 79"-84" Wide] [Fits 85"-90" Wide] [Fits 91"-96" Wide]

Stand-Up / Walkthrough (72" Long, 54" High)

The walkthrough Bimini top is the tallest option, built so you can stand and move around the cockpit without ducking. It is sized for wider boats where the extra height has room to work. Available for boats 72" to 103" wide.

[Fits 72"-84" Wide] [Fits 85"-90" Wide] [Fits 91"-96" Wide] [Fits 97"-103" Wide]

3-Bow Bimini Top Sizes

Every 3-bow Bimini top in our lineup is 72" long; the sizes differ by height and by the width between mounting points. Find your measured width in the table below, then choose the height that fits how you use your boat.

Each size is offered in both Seal Skin Supreme, made with SEAL-TEC™ fabric and backed by a lifetime warranty, and in Seal Skin Elite, backed by a 10-year warranty.

Not sure which size fits? Call the Seal Team at 800-915-0038 or start a live chat.

How to Measure for a 3-Bow Bimini Top

To measure a boat for a Bimini top:

• Pick your mounting points first
• Measure width between them
• Check that 72" of length fits the space
• Confirm the height gives you enough headroom.

Your mounting points control all three measurements, so decide where the top will attach before you pull out the tape. You will need a tape measure, a marker or painter's tape, and a second person to hold the tape steady.

Measure Bimini Top Width

The width of the boat is the primary measurement determining which size you order.

• Choose where the Bimini frame will mount on each side of the boat. Most 3-bow Bimini tops mount on the top of the gunwale or on the inside wall of the hull.
• Mark the left and right mounting points directly across from each other with painter's tape.
• Measure straight across the boat from the center of one mark to the center of the other. This is your Bimini top width.
• Match that number to a width range in the size table above. For example, a 70" measurement calls for a "Fits 67"–72" Wide" top.

Keep in mind that moving the mounts forward or aft can change the width, because most hulls taper toward the bow. This means that it’s very important to measure at the exact spot where the hardware will go.

Measure Bimini Top Length

A Bimini top’s length tells you how much of the boat the top will shade. Every Seal Skin 3-bow Bimini top is 72" long when open, so this step is primarily to confirm that the top fits your layout.

• From your mounting points, measure 72" toward the area you want shaded, usually the helm and seating area.
• Check that nothing blocks the open top within that span (common offenders include things like windshields, consoles, rod holders, or a ski tow pylon).
• Check the folded position too. When the top is down, it should rest clear of the windshield and anything else it could rub against.

Measure Bimini Top Height

A Bimini top’s height determines whether you can sit, fish, or stand under the top.

• Stand or sit where you normally ride, then measure from the deck up to your mounting point.
• Add the frame height of the style you are considering: 36" for low profile, 46" for universal, or 54" for walkthrough.
• Compare the total to the headroom you need. For example, mounts 20" above the deck plus a 54" walkthrough frame put the canvas about 74" above the deck.

The canvas curves between the bows, so actual clearance will be slightly lower near the edges than at the center.

How to Choose the Right 3-Bow Bimini Top

So, which Bimini top is right for you? The ideal 3-bow boat Bimini top will balance headroom, shade, and how you actually spend time on the water. Here are some key considerations in choosing your ideal Bimini top.

• Low profile vs. universal. A low profile Bimini top keeps the frame 10" lower than a universal top, so it catches less wind and keeps sightlines open across the boat. A universal Bimini top, on the other hand, trades that sleek profile for more comfortable seated headroom, which can really make a difference if you carry taller passengers or spend long days under the canvas.
• Universal vs. walkthrough. A universal top is designed for seated comfort, while a walkthrough Bimini top adds 8" more height so passengers can stand and move between seats without ducking. Walkthrough tops start at 72" wide, so they fit mid-size and larger boats rather than narrow fishing hulls.
• Fishing vs. recreational use. Anglers often prefer a low profile top because it keeps a lower silhouette in the wind and folds into a compact position when they need open space to cast. Families and cruisers, on the other hand, tend to choose universal or walkthrough tops, since passengers sit under the shade for hours at a time.
• Standing clearance. If you want to stand at the helm or walk around the cockpit under the top, add your mounting height to the 54" walkthrough frame and confirm the total clears your tallest regular passenger. If everyone is staying seated, however, a 36" or 46" frame is usually enough.
• Shade coverage. All of our 3-bow Bimini tops are 72" long, so the amount of shade is set mainly by where you mount the frame. Mount it farther aft to cover rear seating, or farther forward to better shade the helm.
• Mounting location. Your mounting points set the width you order, the area that gets shade, and where the top rests when folded. Choose mounts that are solid, directly across from each other, and clear of rails, cleats, and rod holders.

3-Bow Bimini Top FAQs

What is a 3-bow Bimini top?

A 3-bow Bimini top is a folding boat canopy whose fabric is stretched over three curved frame bows. The three-bow design is the most common style for small and mid-size boats because it gives solid shade while staying light and easy to fold. Seal Skin 3-bow Bimini tops are 72" long and come in 36", 46", and 54" heights.

How do I measure my boat for a 3-bow Bimini top?

Start by choosing your mounting points, then measure straight across the boat between them to get your width. Next, confirm that 72" of length fits between your mounts and any windshield or console. Finally, add your mounting height to the frame height to check headroom. The measuring guide above walks through each step in more detail.

What size 3-bow Bimini top do I need?

Your size is set by the width between your mounting points and the height you want. Seal Skin offers low profile tops for boats 50" to 96" wide, universal tops for 54" to 96" wide, and walkthrough tops for 72" to 103" wide. Find the range that includes your measured width, then pick your height.

What is the difference between a low-profile and universal Bimini top?

The difference is height. A low profile Bimini top stands 36" high, offering a sleek look and less wind resistance, while a universal Bimini top stands 46" high, offering more comfortable seated headroom. The higher the Bimini top, generally speaking, the more suitable it is for family boating.

What is a walkthrough Bimini top?

A walkthrough Bimini top is a taller top built so passengers can stand and move around underneath it. Our walkthrough Bimini top has a 54" frame and fits boats from 72" to 103" wide, which makes it a good match for deck boats and larger runabouts.

How high should a Bimini top be on a boat?

A Bimini top should be high enough to clear your passengers in the position they usually ride. For seated boating, a 36" or 46" frame is typical; for standing room, choose a 54" frame. Remember to add the height of your mounting points above the deck to find your real clearance.

How wide should a 3-bow Bimini top be?

A 3-bow Bimini top should match the distance between its left and right mounting points, not the overall beam of the boat. Measure straight across at the exact spot where the hardware will attach, then choose the size range that includes that number.