the longest ive ever sat was about 4 hours...my endorphins generally run out after 3. My favorite artist (who also did my half sleeve) moved to Maine so it kills me that i can't get anything else done by him. I'm also itching to get my second half sleeve done but financial means are keeping me from doing it. I have to wait till next year. I have about 50 or so of it done and i'm already in about $1020....sheesh!!
It took me about 6 months to get my sleeve finished and I worked at the shop I got it done at. I guess I can't complain too much since I got a really good deal on it.