An astounding illusion like the Gozinta (or In & Out) Boxes but performed with Red and Blue Envelopes.
The magician removes a blue envelope from inside a Red One. He then places them on top of each other to show both are identical in size. Then to the surprise of everyone he inserts the Red envelope into the Blue one!
Supplied are two special envelopes along with the instructions and ideas for their use. Envelopes measure 4.2″ x 4.4″.