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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
  • Price
  • Subtotal
  • 8mm Kingfisher Evo Sheet 8mm Kingfisher Evo Sheet

    8mm Kingfisher Evo Sheet

    Kingfisher Yacht Ropes
    $0.78
    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 - 8mm...
    Qty in Cart: 0
    Price:
    $0.78
    Subtotal:
  • 7mm Kingfisher Evo Sheet 7mm Kingfisher Evo Sheet

    7mm Kingfisher Evo Sheet

    Kingfisher Yacht Ropes
    $0.64
    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:
    $0.64
    Subtotal:
  • 6mm Kingfisher Evo Sheet 6mm Kingfisher Evo Sheet

    6mm Kingfisher Evo Sheet

    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 6mm Kingfisher Evo Dinghy

    6mm Kingfisher Evo Dinghy

    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 5mm Kingfisher Evo Dinghy

    5mm Kingfisher Evo Dinghy

    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

    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

    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:
  • 1.7mm Samson Dyneema Line

    1.7mm Samson Dyneema Line

    Samson
    $0.28
    This single braid accessory line is designed to meet the various strength, stretch, knot-holding and wear requirements. Made from HMPE Dyneema fiber, this twine yields the highest strength, lightest weight, lowest stretch and longest wear life available...
    Qty in Cart: 0
    Price:
    $0.28
    Subtotal:
  • 2mm Robline Ocean 3000 Dyneema Line - Gray

    2mm Robline Ocean 3000 Dyneema Line

    Ronstan
    $0.35
    Ocean 3000 from Robline is a high-performance 12-strand single braid line made of 100% Dyneema fiber. It offers a high strength-to-weight ratio (stronger than steel) with very low stretch. High abrasion and cut resistance and it even floats. Recommended...
    Qty in Cart: 0
    Price:
    $0.35
    Subtotal:
  • 2mm Robline Dinghy Control Line

    2mm Robline Dinghy Control Line

    Robline
    $0.26
    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:
    $0.26
    Subtotal:
  • 2.7mm Samson Amsteel-Blue Dyneema Line - Gray

    2.7mm Samson Amsteel-Blue Dyneema Line

    Samson
    $0.38
    Amsteel Blue from Samson is a high-performance 12-strand single braid line made of 100% Dyneema fiber. It offers a high strength-to-weight ratio (stronger than steel) with very low stretch. High abrasion and cut resistance thanks to a Samthane coating...
    Qty in Cart: 0
    Price:
    $0.38
    Subtotal:
  • 3mm Robline Dinghy Control Line

    3mm Robline Dinghy Control Line

    Ronstan
    $0.52
    Dinghy Control Line from Robline is a great all around high-tech control line with Dyneema® SK78 core. This 3mm 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:
    $0.52
    Subtotal:
  • 3mm Orion 500 Line

    3mm Robline Orion 500 Line

    Ronstan
    $0.21
    3mm Orion 500 from Robline is a great all-around line for small applications such as rudder downhauls and lashing. It has a soft hand, great strength, and is abrasion resistant. Colors: Green Diameter - 3 mm (1/8 inch) Other Available...
    Qty in Cart: 0
    Price:
    $0.21
    Subtotal:
  • 3mm Samson Amsteel-Blue Dyneema Line - Gray

    3mm Samson Amsteel-Blue Dyneema Line

    Samson
    $0.60
    Amsteel Blue from Samson is a high-performance 12-strand single braid line made of 100% Dyneema fiber. It offers a high strength-to-weight ratio (stronger than steel) with very low stretch. High abrasion and cut resistance thanks to a Samthane coating...
    Qty in Cart: 0
    Price:
    $0.60
    Subtotal:
  • 4mm Robline Ocean 3000 Dyneema Line (Grey)

    4mm Robline Ocean 3000 Dyneema Line (Grey)

    Robline
    $0.94
    Ocean 3000 from Robline is a high-performance 12-strand single braid line made of 100% Dyneema fiber. It offers a high strength-to-weight ratio (stronger than steel) with very low stretch. High abrasion and cut resistance and it even floats. Recommended...
    Qty in Cart: 0
    Price:
    $0.94
    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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