Change the Font Size of an Element help please

1

Tell us what’s happening:

Your code so far

<style>
  .red-text {
    color: red;
  }
  
  p{
    font-size: 16x;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>
<p class="red-text">Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
<p> Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>```

Why is this not working?
2

16x should be 16px.

3

Thank you @kevcomedia