When you scale objects in Inkscape, it either scales the stroke with the object, or it leaves the stroke width alone. I think I've seen a button for it on another post next to "Affect:" but can't find it.
Where is this option actually located?
The setting appears at two places:
View > Show/Hide > Tool Controls Bar).
Edit > Preferences...or shift+ctrl+p)
Behaviour > Transforms
Scale Stroke width