The vast majority of all email subject lines (84%) within the retail industry falls between 21 and 60 characters; achieving the lowest open rate which estimated with 12.8%.
In contrast, only 5% of all email subject lines within the same sector falls between 1 and 20 characters; achieving the highest open rate which estimated with 18.3%.
In the middle place 61+ characters length of all email subject lines (11%) achieving 15.3% open rate, overtopped the lines with 21 to 60 characters (84%) by 2.5% in the open rate.
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