We have a rather large non-responsive newsletter (90kb or so) that we send out bi-weekly. We're in the process of rebuilding this newsletter to be mobile-friendly using the Zurb Ink framework but we are seeing file sizes close to 250kb in size. This is after I've run it through UnCSS and Premailer which removes all unused CSS and then inlines the remaining.

Is this a normal increase in file size when switching to a framework?