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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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  • 9mm Robline Racing Pro Line 9mm Robline Racing Pro Line

    9mm Robline Racing Pro Line

    Robline
    $2.37
    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:
    $2.37
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  • 9mm Robline Coppa DURA

    9mm Robline Coppa DURA Line

    Robline
    $3.71
    Robline Coppa Dura is a sheet for challenging demands aboard sporty boats, especially where little stretch, good grip and low abrasion are needed. This line offers maximum grippiness for ideal manual handling and yet great durability in aggressive...
    Qty in Cart: 0
    Price:
    $3.71
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  • 9mm Rooster Polilite Line Blue 9mm Rooster Polilite Line Black

    9mm Rooster Polilite Line

    Rooster Sailing
    $1.07
    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...
    Qty in Cart: 0
    Price:
    $1.07
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  • 9mm Top Cruiser Kmix Line

    9mm Alpha Cruiser 24 Kmix

    Alpha Ropes
    $1.26
    Cruiser 24 Kmix from Alpha Ropes is a great all around line for sheets and other large diameter applications. This 9 mm double braid line is light weight and offers great grip. It features strong polyester core with 24 plait polyester cover for great...
    Qty in Cart: 0
    Price:
    $1.26
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  • 9mm Robline Coppa 5000 Line Blue 9mm Robline Coppa 5000 Line Lime

    9mm Robline Coppa 5000 Line

    Robline
    $3.71
    Robline Coppa 5000 is a great high performance line for sheeting on larger dinghies and keelboats. It has a Dyneema SK-78 core and provided with a 24-plait cover for easy splicing and stripping. It is ideal for applications where minimum stretch and...
    Qty in Cart: 0
    Price:
    $3.71
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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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