Ive seen bigger, way back when there was a Cheech and Chong album (thats a plastic round thing) that came with a huge Big Bambo rolling paper. Welll............................................. .........
The world official largest joint mabye, but unoffically the largest is much much much larger. Hell, on several occasions have I heard of larger blunts just in my area.
My sort-of close mates big bro used to deal by the pound, and one time him and his mates, while at a bach they rented, piled about 2 or 3 pounds of weed into their fire place, got onto the roof of the house and covered the chimney with a board and cinderblocks, closed all the doors and lit up all the weed for a mammoth hotbox.
I asked him how high his brother got and he said "they were pretty stoned." lol.
Didn't seem like it was worth it to me....If I smoke enough weed (after a 50 bag my throat hurts too much to go on) I just become what I call 'mong,' which is just too stoned to even think. You just sit down like a drone feeling your heartbeat.