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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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  • Product
  • Qty in Cart
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  • 6mm Marlow Excel Racing GP78

    6mm Marlow Excel Racing GP78 Line

    Marlow Ropes
    $2.56
    Marlow Excel Racing GP78 is a high performance dinghy and keelboat control line. The SK78 core is high strength and minimal creep and the Technora blended cover gives fantastic abrasion and heat resistance. The cover also adds grip for wet hands, and is...
    Qty in Cart: 0
    Price:
    $2.56
    Subtotal:
  • 6mm Marlow Excel Racing

    6mm Marlow Excel Racing Line

    Marlow Ropes
    $1.62
    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:
    $1.62
    Subtotal:
  • 6mm Maffioli Swiftcord Line

    6mm Maffioli Swiftcord Line

    Kingfisher Yacht Ropes
    $1.17
    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:
    $1.17
    Subtotal:
  • 6mm Marlow Excel Matrix Line

    6mm Marlow Excel Matrix Line

    Marlow Ropes
    $1.68
    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:
    $1.68
    Subtotal:
  • 6mm Kingfisher Float Line

    6mm Kingfisher Float Line

    Kingfisher Yacht Ropes
    $0.40
    Float Line from Kingfisher is the ideal floating bowline material. The braided multi-filament Polypropylene rope with no core is made from bright colors for high visibility, floats and is an ideal safety rope. 16 Plaint construction Multi-filament...
    Qty in Cart: 0
    Price:
    $0.40
    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:
  • 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:
  • 6mm Alpha SSR Line

    6mm Alpha SSR Line

    Alpha Ropes
    $1.17
    6mm 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:
    $1.17
    Subtotal:
  • 6mm Marlow PreStretch Line

    6mm Marlow PreStretch Line

    Marlow Ropes
    $0.62
    6mm Marlow PreStretch is a 100% polyester single braid line that is pre-stretched to improve strength and reduce elongation. It cleats very well and has great abrasion resistance. A great option for any small sailboat halyard or control line applications...
    Qty in Cart: 0
    Price:
    $0.62
    Subtotal:
  • 6mm Polypropylene Line

    6mm Polypropylene Line

    R&W Marine Cordage
    $0.36
    This polypropylene line is perfect for small boat bow lines and is the perfect choice for Optis and other small prams. Lightweight, floats, and sturdy enough for towing. Lightweight floating line General purpose line Sold by the foot
    Qty in Cart: 0
    Price:
    $0.36
    Subtotal:
  • 6mm Robline Admiral 5000 Line Blue 6mm Robline Admiral 5000 Line Green

    6mm Robline Admiral 5000 Line

    Robline
    $1.31
    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:
    $1.31
    Subtotal:
  • 6mm Robline Dinghy Control Line

    6mm Robline Dinghy Control Line

    Robline
    $1.68
    Dinghy Control Line from Robline is a great all around high-tech control line with Dyneema® SK78 core. This 6mm version is ideal for all kinds of applications where you need the strength of a low-stretch core with the durability of a cover, such as...
    Qty in Cart: 0
    Price:
    $1.68
    Subtotal:
  • 6mm Robline Dinghy Sheet XL

    6mm Robline Dinghy Sheet XL Line

    Robline
    $0.64
    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:
    $0.64
    Subtotal:
  • 6mm Robline Orion 300 Line Green 6mm Robline Orion 300 Line Red

    6mm Robline Orion 300 Line

    Robline
    $0.52
    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:
    $0.52
    Subtotal:
  • 6mm Rooster Polilite Line

    6mm Rooster Polilite Line

    Rooster Sailing

    $0.74
    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 6...
    Qty in Cart: 0
    Price:
    $0.74
    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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