<!DOCTYPE html> <style type="text/css"> .container { font-size: 200px; line-height: 1; } @font-face { /* LinLibertine_R's aspect value = 0.440918 on mac */ font-family : 'referenceFont'; src : url('../../third_party/Libertine/LinLibertine_R.woff') format("woff"); } @font-face { /* OpenSans-Regular's aspect = 0.544922 on mac */ /* OpenSans-Regular's aspect = 0.535156 on linux */ font-family : 'testFont'; src : url('../../resources/opensans/OpenSans-Regular.woff') format("woff"); } .test { font-family: testFont; font-size-adjust: 0.440; } .testNone { font-family: testFont; font-size-adjust: none; } .reference { font-family: referenceFont; } </style> <div class="container"> <span class="test">x</span><span class="reference">x</span> </div> <div class="container"> <span class="testNone">z</span><span class="reference">z</span> </div>