You use your own t-shirts for the effect so the size does not matter. That also allow you to customize the effect:)
Answered at 11:16am on June 17th, 2014 by eostresh (198 karma)
True, you need two shirts, BUT one has to be larger than the other, but not much larger.
Answered at 03:02pm on November 29th, 2015 by robrook (5 karma)
YOU NEED TO HAVE TWO SHIRTS FOR
THIS INCREDIBLE EFFECT! I'VE
PERFORMED IT WITH GREAT RESULTS.
Answered at 02:49am on August 10th, 2014 by midini (2 karma)