\defaultfontfeatures[XSTIX2B]{
  Script=      Default,
  UprightFont= STIXTwoText-Regular.otf,
  UprightFeatures={ SizeFeatures={%
        {Size=-6,    FakeStretch= 1.310, LetterSpace= 2.5, SmallCapsFeatures={ FakeStretch= 1.080 } },%
        {Size=6-7,   FakeStretch= 1.190, LetterSpace= 2.0, SmallCapsFeatures={ FakeStretch= 1.045 } },%
        {Size=7-8,   FakeStretch= 1.115, LetterSpace= 1.5, SmallCapsFeatures={ FakeStretch= 1.035 } },%
        {Size=8-9,   FakeStretch= 1.050, LetterSpace= 1.0, SmallCapsFeatures={ FakeStretch= 1.025 } },%
        {Size=9-10,  FakeStretch= 1.015, LetterSpace= 0.5, SmallCapsFeatures={ FakeStretch= 1.015 } },%
        {Size=10-12, FakeStretch= 1.000, LetterSpace= 0.0, SmallCapsFeatures={ FakeStretch= 1.000, LetterSpace= 0.0 } },%
        {Size=12-14, FakeStretch= 0.980 },%
        {Size=14-17, FakeStretch= 0.955 },%
        {Size=17-20, FakeStretch= 0.935 },%
        {Size=20-23, FakeStretch= 0.925 },%
        {Size=23-28, FakeStretch= 0.910 },%
        {Size=28-35, FakeStretch= 0.905 },%
        {Size=35-,   FakeStretch= 0.895 }%
  } },%
  ItalicFont= STIXTwoText-Italic.otf,
  ItalicFeatures={ SizeFeatures={%
        {Size=-6,    FakeStretch= 1.310, LetterSpace= 2.5, SmallCapsFeatures={ FakeStretch= 1.07 } },%
        {Size=6-7,   FakeStretch= 1.190, LetterSpace= 2.0, SmallCapsFeatures={ FakeStretch= 1.04 } },%
        {Size=7-8,   FakeStretch= 1.115, LetterSpace= 1.5, SmallCapsFeatures={ FakeStretch= 1.02 } },%
        {Size=8-9,   FakeStretch= 1.050, LetterSpace= 1.0, SmallCapsFeatures={ FakeStretch= 1.01 } },%
        {Size=9-10,  FakeStretch= 1.015, LetterSpace= 0.5, SmallCapsFeatures={ FakeStretch= 1.01 } },%
        {Size=10-12, FakeStretch= 1.000, LetterSpace= 0.0, SmallCapsFeatures={ FakeStretch= 1.00, LetterSpace= 0.0 } },%
        {Size=12-14, FakeStretch= 0.980 },%
        {Size=14-17, FakeStretch= 0.955 },%
        {Size=17-20, FakeStretch= 0.935 },%
        {Size=20-23, FakeStretch= 0.925 },%
        {Size=23-28, FakeStretch= 0.910 },%
        {Size=28-35, FakeStretch= 0.905 },%
        {Size=35-,   FakeStretch= 0.895 }%
  } },%
  BoldFont= STIXTwoText-Bold.otf,
  BoldFeatures={ SizeFeatures={%
        {Size=-6,    FakeStretch= 1.265, LetterSpace= 2.5, SmallCapsFeatures={ FakeStretch= 1.170, LetterSpace= 3.0 } },%
        {Size=6-7,   FakeStretch= 1.170, LetterSpace= 2.0, SmallCapsFeatures={ FakeStretch= 1.070, LetterSpace= 2.5 } },%
        {Size=7-8,   FakeStretch= 1.100, LetterSpace= 1.5, SmallCapsFeatures={ FakeStretch= 1.070, LetterSpace= 2.0 } },%
        {Size=8-9,   FakeStretch= 1.040, LetterSpace= 1.0, SmallCapsFeatures={ FakeStretch= 1.055, LetterSpace= 1.5 } },%
        {Size=9-10,  FakeStretch= 1.015, LetterSpace= 0.5, SmallCapsFeatures={ FakeStretch= 1.025, LetterSpace= 1.0 } },%
        {Size=10-12, FakeStretch= 1.000, LetterSpace= 0.0, SmallCapsFeatures={ FakeStretch= 1.000, LetterSpace= 0.0 } },%
        {Size=12-14, FakeStretch= 0.980, SmallCapsFeatures={ FakeStretch= 0.980 } },%
        {Size=14-17, FakeStretch= 0.955, SmallCapsFeatures={ FakeStretch= 0.945 } },%
        {Size=17-20, FakeStretch= 0.935, SmallCapsFeatures={ FakeStretch= 0.920 } },%
        {Size=20-23, FakeStretch= 0.920, SmallCapsFeatures={ FakeStretch= 0.900 } },%
        {Size=23-28, FakeStretch= 0.910, SmallCapsFeatures={ FakeStretch= 0.890 } },%
        {Size=28-35, FakeStretch= 0.895, SmallCapsFeatures={ FakeStretch= 0.875 } },%
        {Size=35-,   FakeStretch= 0.885, SmallCapsFeatures={ FakeStretch= 0.865 } }%
  } },%
  BoldItalicFont= STIXTwoText-BoldItalic.otf,
  BoldItalicFeatures={ SizeFeatures={%
        {Size=-6,    FakeStretch= 1.185, LetterSpace= 2.5, SmallCapsFeatures={ FakeStretch= 1.160, LetterSpace= 3.0 } },%
        {Size=6-7,   FakeStretch= 1.085, LetterSpace= 2.0, SmallCapsFeatures={ FakeStretch= 1.065, LetterSpace= 2.5 } },%
        {Size=7-8,   FakeStretch= 1.060, LetterSpace= 1.5, SmallCapsFeatures={ FakeStretch= 1.065, LetterSpace= 2.0 } },%
        {Size=8-9,   FakeStretch= 1.035, LetterSpace= 1.0, SmallCapsFeatures={ FakeStretch= 1.045, LetterSpace= 1.5 } },%
        {Size=9-10,  FakeStretch= 1.010, LetterSpace= 0.5, SmallCapsFeatures={ FakeStretch= 1.015, LetterSpace= 1.0 } },%
        {Size=10-12, FakeStretch= 1.000, LetterSpace= 0.0, SmallCapsFeatures={ FakeStretch= 1.000, LetterSpace= 0.0 } },%
        {Size=12-14, FakeStretch= 0.970, SmallCapsFeatures={ FakeStretch= 0.960 } },%
        {Size=14-17, FakeStretch= 0.940, SmallCapsFeatures={ FakeStretch= 0.930 } },%
        {Size=17-20, FakeStretch= 0.925, SmallCapsFeatures={ FakeStretch= 0.910 } },%
        {Size=20-23, FakeStretch= 0.910, SmallCapsFeatures={ FakeStretch= 0.885 } },%
        {Size=23-28, FakeStretch= 0.935, SmallCapsFeatures={ FakeStretch= 0.875 } },%
        {Size=28-35, FakeStretch= 0.925, SmallCapsFeatures={ FakeStretch= 0.860 } },%
        {Size=35-,   FakeStretch= 0.885, SmallCapsFeatures={ FakeStretch= 0.850 } }%
  } }%
}