A couple of quick and easy cards, they are both 9.5 cm square.
This one I did as a make 'n' take at a recent workshop, it's using the Circle Circus stamp set in Riding Hood Red, Baja Breeze and So Saffron.
The sentiment is from Party this Way.
I don't know about you, but I always feel I have to finish off the insert and the envelope too.
The other one is simply stamped with the hostess set Silhouette Sentiments and then punched out in squares. I have raised a couple of the designs on dimensionals (I don't think it shows up too well in the photo!)