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Selecting the correct sail for your boat is simple.

Sails are intended to closely, but not precisely, fit most production boats.

You should find most production boats listed in our rig dimension database. This database is provided for you to determine the approximate size of your new sails, but should not be used for the purpose of selecting sails for your boat.

In order to ensure an acceptable fit, it is important that you physically measure your boat.

We will guide you through the process of measuring your boat, and selecting the correct sail.

If you have any questions regarding the process, please do not hesitate to contact us for clarification. 


I = Height of headstay termination above the sheer line

J = Distance between the headstay termination at the deck and the front of the mast at the sheer line.

P = Distance between black bands on the mast, or the maximum luff length of the main.

E = Distance between black bands on the boom, or the maximum foot length of the main

PY & EY are similar to P & E, but indicate mizzen dimensions

(Please note that the measurement rules for rig dimensions vary from class rule to class rule, and from measurement rule to measurement rule. Many yacht designers use different definitions as well. These definitions are general enough to provide guidelines to approximate your sail area. None of the information here is guaranteed to be accurate, as manufacturers often change rig dimensions without notice. You should physically measure your boat and record precise measurements to calculate accurate sail area figures.)

Sail Area Calculations

(Again, these formulas will give approximate sail area calculations.)

Mainsail Area = P x E / 2

Headsail Area = ( Luff x LP ) / 2
( LP is the shortest distance between the clew and the luff )

Approx. 150% Genoa Area = ( 1.5 x J x I ) / 2

Approx. 135% Genoa Area = ( 1.35 x J x I ) / 2

100% Foretriangle = ( I x J ) / 2

Approx. Spinnaker Area =  1.8 x J x I

Measurement guide


To measure your sails please download and complete the measurement sheets below:

Mainsail measurement sheet Arrow Headsail measurement sheet Arrow

At present the online boat search and order system is not implemented yet, please send your enquiery by email.

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