🚀 go-pugleaf

One last point...

If you're in a business with international connections, you also add international access information to your phone numbers, or a "+" as an indicator.

Periods and spaces (and occasionally hyphens) are what I tend to use as separators, not parentheses. And I don't think that substituting these other devices for parentheses reduces readability or causes confusion as long as you maintain standard number groupings.

But, yes, there is a tendency among designers to make type small -- sometimes too small. And it could be hard on the eyes. On the other hand, there is more information that has to be put into that 3.5"x2" space than there was a few years ago, before Website URLs, email addresses, faxes, cell phones, etc. "Calling cards" used to have just a name, title, and town or estate name.

Neil