This is such an easy card to make, I really love it!
For this one I used a piece of 21 x 14 cm of white cardstock, but you can make it any size you want as long as the longest side can be divided by 3.
Divide the white card in 3 scoring at 7 and 14 cm, in order to have 3 identical panel in size. Score the first and last panel on an angle from the top right hand corner down to the bottom left. You created the base of the card. All that’s left to do is to mat and layer using your favourite papers and embellish it.