The brooch is a 1 5/8" circle. Four different designs have been sewn together and folded to create a dimensional half sphere. It has been sealed for durability and water resistance. A gold 1 1/4" pin back is securely fastened to the back.
These paper brooches are inexpensive and somewhat easy to make. See my sidebar and click on the Cut Out + Keep "how to make a 3D brooch" link. You can use any paper sources you have available to design your own paper brooch.
If you are enamored with this design, it is listed in my Etsy shop.