The pop up pyramid pops up on arrival and stands tall, with its unusual shape. It’s a popular choice for getting attention. Delivered flat and upon opening this pop up mailer pops up into a 4 sided pyramid shape with a square base. Fully printable on all sides including both sides of the board envelope (can be mailed in a paper envelope for a more cost effective option). Available DL size upwards. Has been used as desk calendar by placing several calendar months on each side. Holes can be added to one of the four sides to make a desk pen holder.