Your URL font does not seem to fit well with Garamond because the letter has a small x-height (height of lowercase letters like "a, c, e"). I suggest to use a sans serif or typewriter font which either has about the same x-height as Garamond or can be scaled via a LaTeX package -- Helvetica (with the helvet package) is an example of the latter.
As I don't own Garamond Premier Pro, the following example shows how to scale Helvetica so that its x-height about matches that of Times (mathptmx package).
\documentclass{article}
\usepackage{mathptmx}
\usepackage[scaled=0.86]{helvet}
\begin{document}
\huge
Some text in roman \textsf{and sans serif.}
\bigskip
Times' x-height: \the\fontdimen5\font
\sffamily
Helvetica's x-height: \the\fontdimen5\font
\end{document}
