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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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  • 8mm New England Ropes Sta-Set Line

    8mm New England Ropes Sta-Set Line

    New England Ropes
    $1.04
    Sta-Set is a strong, flexible and long wearing performance double braid polyester line with superior durability and dependability. It is high strength, low stretch, and extremely durable, yet it still remains soft over time. Sta-Set is both easy to...
    Qty in Cart: 0
    Price:
    $1.04
    Subtotal:
  • 8mm Robline Globe PRO

    8mm Robline Globe PRO Line

    Robline
    $1.63
    Developed with professional riggers, Globe Pro from Robline is a brand new product design for high performance applications. The 12-strand Robtec core is fully coated and may be stripped and tapered as needed. The core offers high breaking loads and is...
    Qty in Cart: 0
    Price:
    $1.63
    Subtotal:
  • 10mm Marlow D2 Racing Line

    10mm Marlow D2 Racing Line

    Marlow Ropes

    $4.00
    The pre-stretched, bio-based D12 78 core makes Marlow D2 Racing a high-strength, lightweight all-round performer. It is color coded with the cover ensuring identification is assured even if the cover is stripped. Upgrade polyester halyards with D2 Racing...
    Qty in Cart: 0
    Price:
    $4.00
    Subtotal:
  • 8mm Marlow D2 Racing

    8mm Marlow D2 Racing Line

    Marlow Ropes
    $3.14
    The pre-stretched, bio-based D12 78 core makes Marlow D2 Racing a high-strength, lightweight all-round performer. It is color coded with the cover ensuring identification is assured even if the cover is stripped. Upgrade polyester halyards with D2 Racing...
    Qty in Cart: 0
    Price:
    $3.14
    Subtotal:
  • 8mm Orion 300 Line Blue 8mm Orion 300 Line Green

    8mm Robline Orion 300 Line

    Robline
    $0.77
    Robline Orion 300 is a versatile all-round rope featuring a traditional design. Its high UV resistance, longevity, and great ease of handling make this product a benchmark for many recreational and cruising applications. The soft hand and durable...
    Qty in Cart: 0
    Price:
    $0.77
    Subtotal:
  • 8mm Alpha SSR Line

    8mm Alpha SSR Line

    Alpha Ropes
    $1.68
    8mm SSR from Alpha Ropes is a perfect larger diameter sail control line or sheet on small boats and designed with Olympic racers in mind. A single braid blend of Spectra and Cordura makes this line both durable and soft in the hand. Very similar to...
    Qty in Cart: 0
    Price:
    $1.68
    Subtotal:
  • 8mm Robline Admiral 5000 Line Green 8mm Robline Admiral 5000 Line Green

    8mm Robline Admiral 5000 Line

    Robline
    $2.11
    Robline Admiral 5000 is an allround rope that is easy to splice and taper while offering highest breaking load values at the same time. Recommended for halyards on larger boards where low stretch is required. Admiral 5000 is made for sailors and...
    Qty in Cart: 0
    Price:
    $2.11
    Subtotal:
  • 8mm Samson Ultra-Lite Line

    8mm Samson Ultra-Lite Line

    Samson
    $1.38
    Samson Ultra-Lite is lightweight, floating double braid line with a modest strength/weight ratio and a great price point. This 8 mm version is ideal for light-wind sheets for the club racer or performance cruiser and features a Dyneema SK-75/MFP...
    Qty in Cart: 0
    Price:
    $1.38
    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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