DIY Christmas Window Box Insert : Make your holiday home decor

This Christmas inspired window box insert is an amazing craft.
This DIY window box insert comes with the nativity insert and the O Holy Night plate.
The insert - 8.1x8 inches.
The plate - 9x2.85.
Made with great quality birch wood.
Window box can be found here -
https://www.etsy.com/listing/4467214386/diy-window-interchangeable-shelf-sitter
https://www.etsy.com/listing/4471870050/diy-window-interchangeable-shelf-sitter
I cannot guarantee these inserts will fit in window boxes from other sellers. Because everyone sells different wood that may come in different widths.
All of the wood used in this project is 1/8 inch thick.