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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.


Filters
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 10mm Marlow D2 Racing Line

    10mm Marlow D2 Racing Line

    Marlow Ropes

    $3.72
    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:
    $3.72
    Subtotal:
  • 8mm Marlow D2 Racing

    8mm Marlow D2 Racing Line

    Marlow Ropes
    $2.92
    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:
    $2.92
    Subtotal:
  • 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
    $0.79
    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:
    $0.79
    Subtotal:
  • 8mm Marlow Excel Fusion Line

    8mm Marlow Excel Fusion Line

    Marlow Ropes
    $2.26
    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:
    $2.26
    Subtotal:
  • 8mm Maffioli Swiftcord Line

    8mm Maffioli Swiftcord Line

    Kingfisher Yacht Ropes
    $1.98
    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:
    $1.98
    Subtotal:
  • 8mm Robline Globe PRO

    8mm Robline Globe PRO Line

    Robline
    $1.56
    Developed with professional riggers, Globe Pro from Robline is a brand new product design for high performance applications. The 12-strand Robtec core is fully coated and may be stripped and tapered as needed. The core offers high breaking loads and is...
    Qty in Cart: 0
    Price:
    $1.56
    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 Polypropylene Line

    8mm Polypropylene Line

    Novabraid
    $0.45
    The polypropylene line is a multipurpose line that can be used for a variety of things from bow lines to dock lines. Because of its large diameter, and flotation, this line is great for general purpose around the water. Lightweight floating...
    Qty in Cart: 0
    Price:
    $0.45
    Subtotal:
  • 8mm Orion 500 Line

    8mm Robline Orion 500 Line

    Robline
    $0.75
    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:
    $0.75
    Subtotal:
  • 8mm Orion 300 Line Blue 8mm Orion 300 Line Green

    8mm Robline Orion 300 Line

    Robline
    $0.73
    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:
    $0.73
    Subtotal:
  • 8mm Alpha SSR Line

    8mm Alpha SSR Line

    Alpha Ropes
    $1.68
    8mm 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:
    $1.68
    Subtotal:
  • 8mm Marlow Excel Marstron Line

    8mm Marlow Excel Marstron Line

    Marlow Ropes
    $0.70
    8mm Excel Marstron from Marlow is a lightweight sheet that absorbs little to no water, meaning it floats! This makes it a great option for spinnaker sheets or as a bow line for smaller sailboats. Diameter - 8mm (5/16 inch) Core...
    Qty in Cart: 0
    Price:
    $0.70
    Subtotal:
  • 8mm Robline Admiral 5000 Line Green 8mm Robline Admiral 5000 Line Green

    8mm Robline Admiral 5000 Line

    Robline
    $2.01
    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:
    $2.01
    Subtotal:
  • 8mm Robline Dinghy Sheet XL Line

    8mm Robline Dinghy Sheet XL Line

    Robline
    $0.86
    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:
    $0.86
    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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