How to set your printer to print a carton model in N Scale or any other scale.
This page contains some printer settings that you can use to print the more popular scales.
You can generate setting for other scales by using the excellent Online Scale Converter that you find at this link.
Should you have a plan in 1 to 87 scale, use these percentages.
1/87 to other scales
1/87 to 1/87 100%
1/60 145%
OO Scale 1/72 120.83 %
TT Scale 1/20 72.5%
N scale 1/148 58%
N Scale 1/160 54.38%