External dimensions for the lens "square" in original hero 9 case

[riceowls]

Does anyone have an original waterproof case for hero 9 and a caliper. Would love to get the external dimensions of the lens square. I have third-party case and wanted to get a macro lens attachment that goes on top of the case. It said designed for the original case but I am not sure my 3rd party case is the same size.

 

[scrane]

I'd like to help you out, but I only have a Hero8.
Surely, someone has a Hero 9 case and a set of calipers?