This is what the template looks like.
So if you have a Silhouette (die cutting machine) you can take this JPG and open it on your Silhouette, trace it and then save it as a studio file. After mucking around for quite a few minutes on Blogger, I find there is no place on Blogger to upload a file for you and Flickr doesn't see STUDIO files as anything it can upload. But it is easy enough. I used it on 8.5 x 11 inch paper and it worked fine!
If nothing else, just print it and trace around it with scissors!
Now to weed through all that old scrapbook paper I don't want and make envelopes!