Custom made?
I looked around two years ago fora bimini for my my 27. I was hoping to find one on the web or in a catalog that the ad would state, "fits 1984 thru 1990 Catalina 27" but that wasn't the case. I finally decided to spend a few bucks and have one custom made. A fellow came to the boat, took measurements and installed it a few weeks later. It cost me about $650 bucks. I am glad I have one that fits well. I can give you some basic measurements tomorrow but I feel it was worth the extra bucks for a custom job. One more thing, if your tall pull the topping lift tight before you measure. You won't be able to flatten the mailsail as much but you'll appreicate the headroom under the boom. good luck, Jack