We spent time juggling between em and px before but from few months we are using "rem" unit. It works nicely as we are also using font-icons everywhere. See:

We spent time juggling between em and px before but from few months we are using "rem" unit. It works nicely as we are also using font-icons everywhere. See: http://snook.ca/archives/html_and_css/font-size-with-rem http://snook.ca/archives/html_and_css/font-size-with-rem