What is the ideal character length for an email subject line?

The ideal character length for an email subject line is typically recognized to be between 41-50 characters. This range maximizes both the visibility of the subject line in most email clients and the likelihood of engaging recipients. Subject lines that fall within this range are generally concise enough to intrigue the reader while still providing enough context about the email's content.

Longer subject lines, such as those exceeding 50 characters, may often get truncated in inbox previews, especially on mobile devices, making them less effective in grabbing attention. On the other hand, very short subject lines, such as those within the 10-20 character range, risk being too vague to convey meaningful information or provoke curiosity. Thus, the 41-50 character range strikes a balance between clarity and engagement, leading to higher open rates and better overall email performance.