This isn't the prettiest of solutions though (though looks OK with 1.5 times line spacing). If anyone comes up with anything better I'd like to hear it!
I may have missed something, but your reply doesn't do what I asked about. I know how to scale the brackets! I want to place the brackets around the bar, not around the entire symbol.
I hope I'm posting this in the right section: I'm using PDFLaTeX (3.141592-1.30.4-2.2) on a Mac with OS 10.4.11 and TeTeX (old, I know). When building documents pdflatex --shell-escape is converting EPS figures to PDF every time, even when the PDF has a newer time stamp than the EPS version. I ...