Prism99

Okay. I used graph paper figuring a 2.5" cut center and 2" cut strips.

This means the center finishes at 2" and each log finishes at 1.5"

With the center square and 3 rounds of logs, I get a finished block size of 11".

If you did the same with a 2" cut center square, you would get a finished block size of 10.5".