Highlights

• Made in the USA
• Premium double braid nylon rope
• Very high strength and durability
• Excellent elasticity, absorbs shock
• Great abrasion and UV resistance
• Comes with a professionally spliced eye in one end
• Due to the custom nature of this product, we do not offer returns or refunds

Standard Dock Line Eye Sizes

• 3/8", 1/2" and 5/8" diameter dock lines come with a 12" long eye 
• 3/4" comes with an 18" long eye
• 1" comes with a 24" long eye

If you need a longer, non-standard eye-length (or dock line length), you may build your own dock lines using this same rope on our Double Braid Nylon Rope page.

Description

Our premium double braided dock lines are made in the USA. Our dock lines are unique because they have a polyester cover with a nylon core. The polyester has greater UV and abrasion resistance and the nylon core gives the rope high strength and elasticity. The ability to stretch protects your boat and hardware from damage. These ropes are made by expert rope makers using modern braiding equipment and meets or exceeds the standards set by the Cordage Institute specifications for high-performance ropes. Each dock line comes with a professionally splice and stitched eye at one end

Double-braid is typically the strongest construction of rope and has a braided inner core and a braided outer jacket. This rope construction is torque-free and will not hockle or kink, and can be easily spliced. Our premium double braid dock lines are also resistant to rot, mildew, marine growth, chemicals and petroleum products. These high-strength ropes are soft, flexible, and are easy to handle. 

How to Choose the Correct Dock Line Diameter Based on Cleat Size

Many boat owners assume that a larger diameter rope is automatically better. However, oversizing dock lines can cause more harm than good.

Why Bigger Dock Lines Aren’t Always Better

• Oversized rope reduces elasticity

• Poor shock absorption increases hardware stress

• Makes tying off difficult

• Increases risk of cleat damage or failure
  
  

Instead of choosing the biggest rope possible, you should size dock lines according to:

1. The size of your boat

2. The size of your cleats
   
   

Dock Line Diameter Rule of Thumb (Cleat Size Formula)

A simple guideline: Use 1/8 inch of rope diameter for every 2 inches of cleat length

Dock Line Size Chart Based on Cleat Length

Always measure your boat’s cleats before purchasing dock lines.

Recommended Dock Line Diameter by Boat Length

Here are general guidelines based on boat size: (Cleat size should confirm your final choice.)

• Boats up to 24 feet → 3/8" diameter minimum

• 25–32 feet → 1/2" diameter

• 33–44 feet → 5/8" diameter

• 45–55 feet → 3/4" diameter
  
  

Example: Dock Line Size for a 22-Foot Boat

This example boat:

• 22 feet long

• 6-inch cleats

The proper dock line diameter is 3/8 inch.

A 3/8" double braid nylon dock line:

• Breaking strength: 4,400 pounds

• Boat weight: approximately 3,500 pounds
  
  

That means the rope is strong enough to lift the entire boat out of the water.

If a 1/2" rope were used instead:

• It would not fit properly on the cleat

• It would reduce elasticity

• The risk of cleat failure would increase

Proper sizing improves safety and performance.

How to Choose the Correct Dock Line Length for Bow, Stern, and Spring Lines

Length selection depends on your dock setup, tides, and slip configuration, but here are standard guidelines.

Standard Bow and Stern Line Length

Use two-thirds of your boat’s length. Example: 30-foot boat → 20-foot bow and stern lines

Recommended Spring Line Length

Use lines equal to the full length of the boat. Example: 30-foot boat → 30-foot spring lines

How Many Dock Lines Should You Have on Your Boat?

For maximum preparedness:

• 2 bow lines

• 2 stern lines

• 2–4 spring lines

Having multiple lines ensures you’re ready for any docking situation, marina layout, or changing conditions.

Best Double Braid Nylon Dock Lines for Marine Use

Double braid nylon is ideal because it:

• Combines strength and flexibility

• Provides superior abrasion resistance

• Offers controlled stretch under load

• Handles well when tying and untying
  
  

Final Tips for Choosing Dock Lines

• Always measure your cleats first

• Do not oversize rope unnecessarily

• Choose nylon for elasticity

• Keep multiple lines onboard

• Match line length to boat length
  
  

Properly sized dock lines protect:

• Your boat

• Your cleats

• Your dock hardware

• Your investment