The tissue box is a 6 1/4" x 3" piece of cardstock that is scored at 1 1/2", 3", 4 1/2" & 6". Tape the box shut, then attach it in the center of the card at the fold line. It will collapse nicely when the card is folded. To add the tissue inside, cut a tissue in half. Then separate it so it is 1-ply, (makes it less bulky). Stuff it in the tissue box.