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Line By Diameter

Shop Sailboat Line by Diameter: 1mm - 12mm Line

West Coast Sailing carries over 80 different lines from 6 of the best rope manufacturers in diameters ranging from 1mm all the way up to 12mm. Use our handy category filters to narrow in on the specific diameter of lines that work for your application, and then pick the one that meets your exact criteria for performance, color, or price.

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  • 6mm Kingfisher Float Line

    6mm Kingfisher Float Line

    Kingfisher Yacht Ropes
    $0.40
    Float Line from Kingfisher is the ideal floating bowline material. The braided multi-filament Polypropylene rope with no core is made from bright colors for high visibility, floats and is an ideal safety rope. 16 Plaint construction Multi-filament...
    Qty in Cart: 0
    Price:
    $0.40
    Subtotal:
  • 8mm Polypropylene Line

    8mm Polypropylene Line

    Novabraid
    $0.45
    The polypropylene line is a multipurpose line that can be used for a variety of things from bow lines to dock lines. Because of its large diameter, and flotation, this line is great for general purpose around the water. Lightweight floating...
    Qty in Cart: 0
    Price:
    $0.45
    Subtotal:
  • 5mm Polypropylene Line

    5mm Polypropylene Line

    R&W Marine Cordage
    $0.33
    The polypropylene line is a multipurpose line that can be used for a variety of things from bow lines to dock lines. Because of its large diameter, and flotation, this line is great for general purpose around the water. Lightweight floating line General...
    Qty in Cart: 0
    Price:
    $0.33
    Subtotal:
  • 6mm Polypropylene Line

    6mm Polypropylene Line

    R&W Marine Cordage
    $0.36
    This polypropylene line is perfect for small boat bow lines and is the perfect choice for Optis and other small prams. Lightweight, floats, and sturdy enough for towing. Lightweight floating line General purpose line Sold by the foot
    Qty in Cart: 0
    Price:
    $0.36
    Subtotal:
  • 8mm Marlow Excel Marstron Line

    8mm Marlow Excel Marstron Line

    Marlow Ropes
    $0.70
    8mm Excel Marstron from Marlow is a lightweight sheet that absorbs little to no water, meaning it floats! This makes it a great option for spinnaker sheets or as a bow line for smaller sailboats. Diameter - 8mm (5/16 inch) Core...
    Qty in Cart: 0
    Price:
    $0.70
    Subtotal:
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Line Diameter Guide

Recommended Diameter by Application & Boat Length

Application

Boat Length
10 - 18 Feet

 Boat Length
18 - 24 Feet		 Boat Length
24 - 32 Feet		 Boat Length
32 - 38 Feet		 Boat Length
38 - 45 Feet		 Boat Length
45 - 52 Feet
Main Halyard 6mm / 1/4 in  6mm / 1/4 in 8mm / 5/16 in  8mm / 5/16 in  9mm / 3/8 in 11mm / 7/16 in
Jib/Genoa Halyard 6mm / 1/4 in  6mm / 1/4 in 8mm / 5/16 in  8mm / 5/16 in  9mm / 3/8 in 11mm / 7/16 in
Spinnaker Halyard 6mm / 1/4 in  6mm / 1/4 in  8mm / 5/16 in 9mm / 3/8 in  9mm / 3/8 in 11mm / 7/16 in
Topping Lift 6mm / 1/4 in 6mm / 1/4 in 8mm / 5/16 in 9mm / 3/8 in 9mm / 3/8 in 11mm / 7/16 in
Mainsheet 8mm / 5/16 in 9mm / 3/8 in 9mm / 3/8 in 
 9mm / 3/8 in  11mm / 7/16 in 12mm / 1/2 in
Jib/Genoa Sheet 6mm / 1/4 in 8mm / 5/16 in 9mm / 3/8 in  9mm / 3/8 in 11mm / 7/16 in 12mm / 1/2 in
Spinnaker Sheet 6mm / 1/4 in 8mm / 5/16 in 8mm / 5/16 in 8mm / 5/16 in 9mm / 3/8 in 9mm / 3/8 in
Tack Line 5mm / 3/16 in 6mm / 1/4 in 9mm / 3/8 in 9mm / 3/8 in  9mm / 3/8 in 11mm / 7/16 in
 

MM to Inch
Conversion Chart

  1mm = 3/64 inch  2mm = 5/64 inch  3mm = 1/8 inch 4mm = 5/32 inch  5mm = 3/16 inch  6mm = 1/4 inch
7mm = 9/32 inch   8mm = 5/16 inch  9mm = 3/8 inch  10mm = 25/64 inch  11mm = 7/16 inch 12mm = 1/2 inch 

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