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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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  • New England Ropes Nexus Pro

    7mm New England Ropes Nexus Pro Line

    New England Ropes
    $1.99
    Nexus Pro by New England Ropes has been developed in cooperation top sailors. Nexus Pro has a durable, lightweight cover that offers excellent grip and holding power. The core is pure Dyneema for ultra-strength and low-stretch. Colors: Blue,...
    Qty in Cart: 0
    Price:
    $1.99
    Subtotal:
  • 5mm Kingfisher Evo Race 78 Line 5mm Kingfisher Evo Race 78 Line

    5mm Kingfisher Evo Race 78 Line

    Kingfisher Yacht Ropes
    $1.13
    Evolution Race 78 from Kingfisher has a high performance Dyneema SK78 12 strand coated core that is high strength, low stretch and low creep. It has a hard wearing HT braided Polyester cover and is easy to splice. Diameter - 5mm (3/16 inch) Core...
    Qty in Cart: 0
    Price:
    $1.13
    Subtotal:
  • 4mm Kingfisher Evo Race 78 Line 4mm Kingfisher Evo Race 78 Line

    4mm Kingfisher Evo Race 78 Line

    Kingfisher Yacht Ropes
    $0.79
    Evolution Race 78 from Kingfisher has a high performance Dyneema SK78 12 strand coated core that is high strength, low stretch and low creep. It has a hard wearing HT braided Polyester cover and is easy to splice. Diameter - 4mm Core - 12 Strand...
    Qty in Cart: 0
    Price:
    $0.79
    Subtotal:
  • 3mm Kingfisher Evo Race 78 Line 3mm Kingfisher Evo Race 78 Line

    3mm Kingfisher Evo Race 78 Line

    Kingfisher Yacht Ropes
    $0.50
    Evolution Race 78 from Kingfisher has a high performance Dyneema SK78 12 strand coated core that is high strength, low stretch and low creep. It has a hard wearing HT braided Polyester cover and is easy to splice. Diameter - 3mm Core - 12 Strand...
    Qty in Cart: 0
    Price:
    $0.50
    Subtotal:
  • 10mm Kingfisher Matte Polyester Line 10mm Kingfisher Matte Polyester Line

    10mm Kingfisher Matte Polyester Line

    Kingfisher Yacht Ropes
    $0.92
    Matte Polyester from Kingfisher is a soft polyester braid on braid with a high grip staple polyester cover. It is ideal for sheets, control lines and classic rigging, and super comfortable in the hand. Diameter - 10mm Core - Polyester Cover...
    Qty in Cart: 0
    Price:
    $0.92
    Subtotal:
  • 8mm Kingfisher Matte Polyester Line 8mm Kingfisher Matte Polyester Line

    8mm Kingfisher Matte Polyester Line

    Kingfisher Yacht Ropes
    $0.68
    Matte Polyester from Kingfisher is a soft polyester braid on braid with a high grip staple polyester cover. It is ideal for sheets, control lines and classic rigging, and super comfortable in the hand. Diameter - 8mm Core - Polyester Cover -...
    Qty in Cart: 0
    Price:
    $0.68
    Subtotal:
  • 6mm Kingfisher Evo Sheet Line 6mm Kingfisher Evo Sheet Line

    6mm Kingfisher Evo Sheet Line

    Kingfisher Yacht Ropes
    $0.58
    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:
    $0.58
    Subtotal:
  • 6mm Kingfisher Evo Dinghy Line 6mm Kingfisher Evo Dinghy Line

    6mm Kingfisher Evo Dinghy Line

    Kingfisher Yacht Ropes
    $0.40
    Evolution dinghy line from Kingfisher has been developed in conjunction with some of the worlds leading dinghy manufacturers. The 32 plait Polyester cover provides good abrasion resistance and excellent performance in cleats. It is ideal for halyards and...
    Qty in Cart: 0
    Price:
    $0.40
    Subtotal:
  • 5mm Kingfisher Evo Dinghy Line 5mm Kingfisher Evo Dinghy Line

    5mm Kingfisher Evo Dinghy Line

    Kingfisher Yacht Ropes
    $0.35
    Evolution dinghy line from Kingfisher has been developed in conjunction with some of the worlds leading dinghy manufacturers. The 32 plait Polyester cover provides good abrasion resistance and excellent performance in cleats. It is ideal for halyards and...
    Qty in Cart: 0
    Price:
    $0.35
    Subtotal:
  • 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
    Subtotal:
  • 10mm New England Ropes Sta-Set

    10mm New England Ropes Sta-Set Line

    New England Ropes
    $1.31
    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:
    $1.31
    Subtotal:
  • 6mm New England Ropes Sta-Set

    6mm New England Ropes Sta-Set Line

    New England Ropes
    $0.77
    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:
    $0.77
    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:
  • 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:
  • 2mm Robline Dinghy Control Line

    2mm Robline Dinghy Control Line

    Robline
    $0.27
    Dinghy Control Line from Robline is a great all around high-tech control line with Dyneema® SK78 core. This 2mm version is ideal for small applications or lashing blocks on dinghies. Colors: Red,  Blue, Green, Yellow Diameter - 2mm (5/64...
    Qty in Cart: 0
    Price:
    $0.27
    Subtotal:
  • Total: items /

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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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