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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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  • Qty in Cart
  • Quantity
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  • Subtotal
  • 8mm Marlow Blue Ocean Doublebraid

    8mm Marlow Blue Ocean Doublebraid Line

    Marlow Ropes
    $0.86
    Blue Ocean Doublebraid is Marlow Ropes' latest addition to the eco-conscious Blue Ocean product range which is manufactured from sustainable materials. The heat-set braid-on-braid Doublebraid is made from 100% recycled waste plastic bottles and offers...
    Qty in Cart: 0
    Price:
    $0.86
    Subtotal:
  • 8mm Marlow Excel Fusion Line

    8mm Marlow Excel Fusion Line

    Marlow Ropes
    $2.39
    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:
    $2.39
    Subtotal:
  • 7mm Marlow Excel Matrix

    7mm Marlow Excel Matrix Line

    Marlow Ropes
    $2.09
    Excel Matrix from Marlow is a high performance dinghy and small keelboat sheet. This is an ideal choice for spinnaker sheets. Does not kink or absorb water and is easy to taper thanks to thicker Dyneema core and thinner cover. High grip, blended cover of...
    Qty in Cart: 0
    Price:
    $2.09
    Subtotal:
  • 6mm Marlow Excel Matrix Line

    6mm Marlow Excel Matrix Line

    Marlow Ropes
    $1.80
    Excel Matrix from Marlow is a high performance dinghy and small keelboat sheet. This is an ideal choice for spinnaker sheets. Does not kink or absorb water and is easy to taper thanks to thicker Dyneema core and thinner cover. High grip, blended cover of...
    Qty in Cart: 0
    Price:
    $1.80
    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:
  • 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:
  • 6mm Marlow Excel Racing

    6mm Marlow Excel Racing Line

    Marlow Ropes
    $1.75
    Marlow Excel Racing is one of our favorite go to options for dinghy control lines and even halyards. It features a color matched Dyneema SK-78 core for low stretch with a 16 plait cover for improved abrasion resistance and durability. It also can...
    Qty in Cart: 0
    Price:
    $1.75
    Subtotal:
  • 4mm Marlow Excel Racing Line Available in Red, Gray, Blue, and Lime

    4mm Marlow Excel Racing Line

    Marlow Ropes
    $1.02
    Marlow Excel Racing is one of our favorite go to options for dinghy control lines and even halyards. It features a color matched Dyneema SK-78 core for low stretch with a 16 plait cover for improved abrasion resistance and durability. It also can...
    Qty in Cart: 0
    Price:
    $1.02
    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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