I saw a neat tutorial on You Tube to create a boxy envelope for dimensional flowers, and thought I would give it a try. However, instead of 110 lb cardstock, I used chipboard, like I would to create an album cover. I lightly scored with an Exacto Knife and then folded the piece back, reinforcing it with some decorative Duct tape. This would probably be easier either making a smaller box, or having a much larger piece of chipboard. I used what I had on hand, as it was just a trial (and one that I will certainly use, even though not perfect).
My card measures about 6″ x 6″ x 1.5″ – the 1.5″ being the roses that is on tope of the card. So I measured my chipboard to be an 8″ square, scoring at 6.5″ along each side and one end. This makes up the back of the box, the bottom, and the two sides – you have to cut out a little square along the bottom on each side that is 1.5″ square – fold your pieces in and reinforce with the Duct Tape. then you will need a 6.5 x 6.5″ square of chipboard for the front – secure in place with the Duct Tape – perhaps even on the inside. For the top and the flap cut, 6.5″ x 4.5″, score along the long side at 1.5″ for the top, cut the corners on the 3″ side, and then secure to the back with Duct Tape.. Cover each folded piece of cardstock with Duct Tape as well, if you have not already done so. Then cut some paper to place on top of the Cardstock – I chose a light yellow, so the address would be easy to see by the postman. You can embellish the card as well if you like. Slip the card inside, secure the flap with either Score-Tape or some other glue, and it is ready for posting!