This was done for a card exchange.  I got the idea from Craft Warehouse where they used a envelope for the card. You slip a gift card behind the bubbles. Well I didn't like the look on the inside so I changed it.  And this is how it came out.

This is the inside of the card.  I took a piece of card stock 5 1/2 by 9 inches and scored it center both length and width.  Cut out the bottom left side after scoring it.  Before folding the bottom right side up, cut off about

1 inch off and then use a punch to decorate it.  Fold that right bottom piece up and glue  the edges down .  Do not glue the top( that's so you can put a gift card in it).

On the front I use foam mounting on the corners so I could slip a ribbon through it to tie it shut.