"How long is a piece of string?" may be a rhetorical question, but I'm hoping there's an answer to "How many pixels long will my string be when rendered into a GUI.Box?"
I want to grow my box to make it big enough to fit my string. GUI.skin.box.lineHeight * numberOfLines tells me how tall it will be, but there's no equivalent for character width. (And since not all characters are the same width this wouldn't work anyway.)
What I want is something like the MeasureText methods in Windows Forms.
As a workaround for now I'll split the string into lines, find the longest line, and multiply by an average character width.