I don't have any problem with a FR-30 with a 30 to 50 ml balloon. I usually put about 35 cc in the balloon and it works for me quite well. While my urologist says you shouldn't masturbate with a catheter in you, I have, no big thrill to me. some say otherwise. I enjoy wearing a catheter, all the smaller sizes leak on me, I tried smaller ones they were terrible.So go as big as you want without any pain. Enjoy wearing your catheter.