You need at least a 12'. Some are easier to get in and out of than others. I have a sit in that's difficult to get in and dang near impossible to get out of without getting wet. I'm 50 with two bad knees. I also have an ascend fs128t that's a sit on top that is way easier and has a nice raised seat and I don't think I could tip her over if I tried. Still get my feet wet every now and then but worth it.