An A3 size sheet of paper
Makes and ideal A4 sheet of paper for a 12ft tall person.
( sandettie light vessel automatic New Twitter - @bollocksreally, Mon 22 Aug 2011, 8:58, 4 replies, latest was 13 years ago)

Shouldn't that be A2?
After all, if the linear measurement was doubled, the area would be quadrupled. Unless you do mean that the person was twice as tall, but just as wide, in which case

Ah fuck it.
( Ghoti Fingers, Mon 22 Aug 2011, 18:10, Reply)

no
Because the paper is twice the size in both dimensions and therefore the aspect remains the same
( sandettie light vessel automatic New Twitter - @bollocksreally, Tue 23 Aug 2011, 0:30, Reply)

Isn't it sqrt(2) times as long and sqrt(2) times as wide?
A3 is twice the area of A4. A3 folded in half (in one dimension) gives A4.
( Ghoti Fingers, Tue 23 Aug 2011, 8:53, Reply)

Well ok,
a person who is 8' 5.8"
( sandettie light vessel automatic New Twitter - @bollocksreally, Tue 23 Aug 2011, 11:00, Reply)