This is the graduation card I usually make for graduating seniors. The template came from a die cut punch at a scrapbook store that I punched out several years ago. I just keep tracing the same one. I usually cut it out of card stock in their school colors. Then I make a tassel out of gold or silver thread and hang it from a brad on the front. I line in inside with the same shape of white card stock to write on.
When I mail things I like to decorate and draw on the envelopes....usually a Texas Flag. Sometimes I stamp on them but if it's just one thing I use markers. Here's the back of the envelope to my niece for this graduation card.