So , if you're like me, you may have 1, 2 or 20 planners, and they all have different size inserts and different hole punch configurations. Well here is a template I found online that might help with measurements.
This helped me a lot, hope it helps you too :)
Contribution acknowledgement to:
By Lukke - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=16049600