LaTeX: Resize PGF image (but not text)

Question

Hello,

How can I resize a pgf image in LaTeX, but keep the text in the image the same size?

I can't use \resizebox because this also resizes the text.

I understand that I can use the following in my pgf file:

\begin{tikzpicture}[scale=2]

However, that scales the image, rather than letting me resize it to a specific width. So this is also no good.

Thank you!