|necklace: DIY, sweater: Mana, dress: no name, shoes: Peko, bag: no name|
For this DIY project, you will need a piece of cardboard (you can recycle and use a cardboard packaging of some used product like I did) and acrylic paints. Paint the princess on the cardboard using acrylic paints. Wait for it to dry then cut it out. You can sketch it first with pencil. I painted directly because I don't always sketch with pencil when I'm using acrylic paints. Sometimes I just paint with acrylics without a sketch. You might also use a reference if you feel like it will make things easier. I didn't use a reference myself.
If you don't have any art skills, you can always opt for the following: find a princess (queen) design you like, print in out or cut it out of a magazine, then glue it to a piece of cardboard, wait for it to dry and then cut it out. Basically, you can make a bookmark out of anything. All you need is is a bit of cardboard or thick paper. You can also get really creative and use fabric and other materials. The possibilities are endless, really.