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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 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 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:
  • 8mm Kingfisher Evo Sheet Line 8mm Kingfisher Evo Sheet Line

    8mm Kingfisher Evo Sheet Line

    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:
  • 8mm Orion 500 Line

    8mm Robline Orion 500 Line

    Robline
    $0.78
    8mm Orion 500 from Robline is one of our favorite all-around, jack-of-all-trades type line options. It is a fantastic all purpose polyester line suitable for mainsheets and jib sheets in many small sailboats. It has a soft hand, great strength, and is...
    Qty in Cart: 0
    Price:
    $0.78
    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 Robline Dinghy Sheet XL Line

    8mm Robline Dinghy Sheet XL Line

    Robline
    $0.91
    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:
    $0.91
    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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