Wendy Cranford created an awesome tutorial for Splitcoaststampers for a faceted box. As I was making one from her tutorial I discovered a problem (from my view)–her box required a piece of cardstock11 1/2″ x 7 7/8″, which meant using 12by 12 if you are in the US or A4 if in a metric market. Since I live in the US and don’t have very many colors avail in 12by12 I decided to modify her design to fit 8 1/2 by 11in cardstock. In the photo below, the one in the back was made with her directions using 12 by 12 Raspberry Ripple Cardstock.(yes it is retired- but it was my test sample) The one one the left is made out of a piece of 8 1/2 by 11 Flirty Flamingo cut to 10 3/4 by 7 5/8.
After cutting the cardstock to size, score at 23⁄8, 46⁄8, and 71⁄8 on the short edge. Turn it 90 degrees on your scoreboard. It will look like the picture below. 
Score at 23⁄8, 46⁄8, 71⁄8 and 91⁄2 the long edge down to the second score line. Turn it over and use the same measurements to score to what is now the first score line. You will now have the lines shown below except the diagonals which you will score from point to point as shown below.
The final diagram shows your final cut lines. Cut up and down on the black lines and remove the grey sections.
From here is a simple process of burnishing all your score lines, applying adhesive to the half triangle flap and joining the middle section.Then you glue the bottom flaps together and tuck in the top flaps. And when you are done you can embellish as you wish. I created a dragonfly with double wings out of vellum stamped with the Dragonfly dreams stamp set and die cut the body from the matching die. I used the white gel pen to make the eyes stand out.
Hope you enjoyed this mini tutorial and try it out yourself it is sooo…easy! I am so glad Wendy inspired me to convert this to 81⁄2 by 11.
‘Til next time…Happy Stamping!
~Kathy