Sometimes the pole is half one colour and half another. Sometimes its divided into thirds with the two outer sides being the same colour etc. There is no exact measurement!!! I take it you are painting your poles? There are many many different designs on poles. if it is not for show purposes basically do what ever you think looks nice, it will only benefit your horse for him to have to jump crazy unusual colours and patterns:) if it is for a show, divide your poles into halves , thirds and quarters with a pencil and usually only two/three colours per pole looks the best. What also looks nice is inbetween each colour you can do small strips of white to divide the colours neatly after you have painted the main colours:)
This can vary on how wide the strips of paint on the show jumping poles were painted on. People don't paint every pole in the world with the same width! Sorry if I misunderstood your question, but I think that's what your asking .
It really doesn't matter, just paint them however you feel like. The point of the stripes is so that you can identify the center of the pole or also line up angles to fences easier to cut time.
They can all vary - theres no real right or wrong width strips due there being such a variety of coloured poles available.
pets question and answers,www.5d2d.com xx