When I bought my boat I had 24" single line lifelines. I measured them when I was ordering new ones. My first sail out of Emeryville a good friend of mine who I had been sailing with for almost 10 yrs at that point. After about 30 minutes or so he realized we never brought in the fenders went forward to grab them. High side went fine. Then he went to grab the low side fenders a gust hit he stepped into the bay to catch his balance. Luckily he didn't go overboard. Needless to say those we're the first things I upgraded.