This video says you use an A4 (8.27 x 11.69) sheet of copy paper to make an "envelope". Actually what forms is a small folder with pockets on all four faces inside and out. I thought it would be cute to use a sheet of wrapping paper to match your gift to make the "envelope" then tuck a name card in the front pocket and notes or small gifts in the other pockets.
http://www.expertvillage.com/video/5939_easy-origami-envelope.htm
Linda B:)