I did this card for Operation Write Home for the deadline on May 31 for Independence Day cards. I used a card kit idea from Sandy, the OWH President. The measurements are on her blog here.
Speaking of Operation Write Home, this Saturday they are hosting a Memorial Day Blog Hop featuring "Miss You" cards. They may be red, white and blue in honor of Memorial Day or any color at all. Today is the deadline if you'd like to participate. If you just want to hop, that's great too! There are at least 100 participants so check it out if you are in need of some inspiration!