How to print to 100% scale?

I am trying to print a US Letter Size document with specific measurements, but the printed dimensions are slightly smaller than dimensions on Vectornator. A 3” line will only be 2.75” (and some change) Is there anywhere to change print settings within the app to print a 100% scale, or do I need to manually scale up the vectors by 92%?

I’ve tried saving the document and printing it from images and also from Vectornator itself, and neither will print 100% scale

Thanks!

Interesting discovery, for anyone else who may come across this issue - if I changed the unit of measurement from inches to centimetres, it prints exactly 100% scale.