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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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  • 7mm Robline Racing Pro Line 7mm Robline Racing Pro Line

    7mm Robline Racing Pro Line

    Robline
    $1.64
    Robline Racing Pro is a 12 strand single braid line made with a high tech mix of Dyneema and Technora fibers for minimal stretch and abrasion. This high tech mix of fibers provides a soft hand feel, great cleating ability and remarkable longevity...
    Qty in Cart: 0
    Price:
    $1.64
    Subtotal:
  • 7mm Maffioli Swiftcord Line

    7mm Maffioli Swiftcord Line

    Kingfisher Yacht Ropes
    $1.60
    Gottifredi Maffioli Swiftcord from Kingfisher Ropes is lightweight, strong, durable, comfortable to hold in your hands. Made popular by Olympic dinghy sailors, Swiftcord is a favorite among many active sailors. It is a hollow braid construction with an...
    Qty in Cart: 0
    Price:
    $1.60
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  • 7mm Kingfisher Evo Sheet Line 7mm Kingfisher Evo Sheet Line

    7mm Kingfisher Evo Sheet Line

    Kingfisher Yacht Ropes
    $0.64
    Evolution Sheet from Kingfisher has a braided HT Polyester cover and lightweight braided multi-filament Polypropylene core. This construction gives added abrasion resistance and is still very flexible, lightweight and strong.  Diameter -...
    Qty in Cart: 0
    Price:
    $0.64
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  • 7mm Marlow Excel Fusion Line

    7mm Marlow Excel Fusion Line

    Marlow Ropes
    $1.94
    Marlow Excel Fusion is a high performance line featuring a blended Dyneema and Polypropylene cover, ensuring no water absorption, great abrasion resistance through ratchets and cleats, and a soft feel in the hand. The Dyneema SK78 core provides...
    Qty in Cart: 0
    Price:
    $1.94
    Subtotal:
  • 7mm Rooster Polilite Line Black 7mm Rooster Polilite Line Blue

    7mm Rooster Polilite Line

    Rooster Sailing
    $0.79
    Rooster Polilite line was designed specifically for the headache of dealing with a tangled Laser mainsheet. This line is strong, prevents tangles, and has minimal water absorption - perfect as a mainsheet on a Laser or any number of other boats! This 7...
    Qty in Cart: 0
    Price:
    $0.79
    Subtotal:
  • 7mm Robline Dinghy Sheet XL Line

    7mm Robline Dinghy Sheet XL Line

    Robline
    $0.77
    Dinghy Sheet XL from Robline was designed specifically to avoid kinks in a small boat applications such as main or jib sheets. This line offers good grip and abrasion resistance while keeping a round shape under load. The polyester/polyamide blend cover...
    Qty in Cart: 0
    Price:
    $0.77
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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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