Measurement units

I’m looking at blender to help me build some water tight parts to fit existing parts.

My work flow is to scan the part to be fitted then I bring that into Blender and I’m looking to build off of that but I want to make sure I’m maintaining actual size. I will then export to another program to generate the G code and print the objects. Make sense>>>

My main question is how do you control the size of an object and can is it relative to inches or MM???

Thanks for your help

You can set units on the ‘Scene’ panel:-

You may have to employ a multiplier when exporting though.
Default for metric is metres; if you want the numbers in mm, set the units to metric and the scale to 0.01

Thanks I will give that a shot

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