Sets or returns an float that represents the font size for a character run. The font size will always be a multiple of 0.5.

public double FontSize{ get; set; }
Public Property FontSize() As Double

MS Word equivalent: Format menu > Font... > Font tab > Size:

          //--- Return FontSize
          float fontSize = oFont.FontSize;

          //--- Set FontSize to 16 points
          oFont.FontSize = 16.0;
        
          '--- Return FontSize
          Dim fontSize As Float = oFont.FontSize

          '--- Set FontSize to 16 points
          oFont.FontSize = 16.0