how to create font-size for html email on iphone

Question

I'm trying to create an email that will display the same number of spaces horizontally on a iphone 5 and and iphone 6. Is there anyway to do that with proportional fonts?

Answer 1

You would want to look into using viewport units like vw. These use a percentage of viewport width or height. However, this may not be supported in the email client used by the user.

CSS:

h3 {
  font-size: 5vw;
}