They’re certainly the most common – the majority of the subject lines of the emails we examined were 30-39 characters long (and mind you, we examined around 2 billion emails from the GetResponse database sent in Q4 2016, all over the globe.) What GetResponse noticed was the fact that the subject lines that got the highest open rates were 90-119 characters long. Not something you’d call a short subject line, right? Same goes for click rates - the research found that click rates are also the highest for longer subject lines (130-139), with the most popular length somewhere in the middle. Get the full story at GetResponse