Agree w/Russ
Those dimensions sound about right for a 100 or 110 jib. I just bought a new 135 and main, and it is plenty big. For the range of conditions I see on Long Island Sound, I agree with Russ that a 150 on roller furling is too big. It might be fine for the light wind days we see in August, but it is generally too breezy here to have full 150 jenny cranked out very often. I find my Oday 23 is very nicely balanced in 15 knots of breeze with a reefed main and my 135 genny fully rolled out. I can sail in control in almost 20 knots of wind with a reefed main and the jenny rolled in to a 100. You can't roll up a 150 that small and have any kind of sail shape. However, I would say the size of sail you would need will depend compeletely on the conditions you expect. The previous owner of my boat had a light air 165 jenny made. I almost never used it, but he told me he used that sail more than the 100 jib. You asked for actual sail dimensions for the Oday 23. Any sailmaker can tell you the proper dimensions for a sail if you can provide the I, P, E and J rig dimensions for your boat. For the Oday 23 Mark II (mid 70's to the end of production), the published rig dimensions are: I=28.0'; P=23.5'; E=9.0'; J= 10.0'. Before making any sails, any decent sailmaker will either take his own measurements of your actual rig, or insist that you do so for him. They will then plug the numbers into a formula and come up with actual sail dimensions.
