stix-fonts/stix-fonts-sizes-fontconfig.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias binding="same">
    <family>STIXSize1</family>
    <accept>
      <family>STIXGeneral</family>
    </accept>
  </alias>
  <alias binding="same">
    <family>STIXSize2</family>
    <accept>
      <family>STIXGeneral</family>
    </accept>
  </alias>
  <alias binding="same">
    <family>STIXSize3</family>
    <accept>
      <family>STIXGeneral</family>
    </accept>
  </alias>
  <alias binding="same">
    <family>STIXSize4</family>
    <accept>
      <family>STIXGeneral</family>
    </accept>
  </alias>
  <alias binding="same">
    <family>STIXSize5</family>
    <accept>
      <family>STIXGeneral</family>
    </accept>
  </alias>
</fontconfig>