I went a bit crazy buying shaped cards recently and got these cute handbag-shaped cards as well. There is a small tab on the back so when you fold the card in half you fix the front and the back together at the top, so the card actually stands up by itself. It can easily be opened again to write a message inside.
As I wanted this to look like a bag I covered the handle in brown paper and the main part of the bag in pink patterned paper, and added a die-cut bow and some stick-on gems. Simples!