There are lots of variations also that you can do if you like. A friend of mine added a strip of elastic so she could anchor it on the page and her DGS can't shake it out of her book. Another friend suggested adding heatnbond? inside for a little more stiffness.
I spray mine with sizing and let it set and it gets pretty stiff.
Some like to add ribbons etc. All kinds of ideas to make them special!