- "ch width css", e.g: https://www.freecodecamp.org/news/css-unit-guide/#:~:text=Th....

- "average length of English word", e.g: https://www.researchgate.net/figure/Average-word-length-in-t....

So:

- 8 to 10 words, call it 9

- average word length: call it 5

- 5 * 9 = 45 word characters

- 9 words that's 8 space characters

- 45 + 8 that's 53 monospace characters

- in monospace all characters should have 1ch width (width of 0-character), so

- css as follows:

  :root, * {
    font-family: monospace !important;
  }

  .whatever-comment-class-is, p {
    max-width: 53ch;
    word-break: break-all;
    overflow: hidden;
  }