let statements = [
  getText(Siq, "Benefit Statement 1"),
  getText(Siq, "Benefit Statement 2"),
  getText(Siq, "Benefit Statement 3")
];

let longestString = Math.max(
  statements[0].length,
  statements[1].length,
  statements[2].length
);

let benefitFontSize = 13;
if (longestString >= 50) {
  benefitFontSize -= 1;
  if (longestString >= 60) {
    benefitFontSize -= 1;
  }
}

SetFields(Siq.Root(),[
  ["name","Benefit Statement 1"],
  ["name","Benefit Statement 2"],
  ["name","Benefit Statement 3"],
],"fsize",benefitFontSize);