What is the max number of characters are allowed in a Phone field?

Question

What is the maximum number of characters allowed in a field set with the Phone type? The online documentation that I found only says:

Phone fields contain phone numbers, which can include alphabetic characters. Client applications are responsible for phone number formatting.

But I do not see any mention of the max size.

Answer 1

I found the answer on a different page:

Phone: Primary phone number of account. Up to 40 characters are allowed in this field.

So the answer seems to be 40 characters.