This focus ring goes on the front of WyzeCam v3 lens to achieve manual focus in order to use your WyzeCam for 3D Printing or Bird-feeder cam.

Dimensions: 23.5mm diameter x 8mm height. The serrated portion (actual thumb-finger ring) is 3mm high, and the thin sleeve portion that goes on the lens is 5mm high x 1mm wall thickness.

First, watch all the videos mentioned below.
Make sure that you have removed the rubber seal from around the lens. This seal when removed will leave enough space around the lens for the focus ring. Just push the 3D printed focus ring on the already loosened lens, and you are all set to enjoy.

Follow these videos for more details
https://www.youtube.com/watch?v=PnqDFVH_lfU
https://www.youtube.com/watch?v=VkqX9yg0odU&t=346s
https://www.youtube.com/embed/kkKAMMNlaf4

Above videos are not mine, but sharing here for educational purpose only. The focus ring is my unique design. Feel free to print/remix and enjoy it. Don't forget to like :-)