I made this card for my Mother in-law, this mothers day.
To do this I took a piece of A5 cardstock (half of A4) and folded it to create a A6 card. I then cut the corner off, I don't know why I thought to do this but it worked. when I covered it I took a piece of A6 paper and glued it on, then very carefully I cut with my knife for a clean cut, the excess. The excess was then place inside the card, so that the lines matched up. All that was left then was embellishments and a sentiment on the inside.