Knock Knock’s Self-Mailers provide a witty solution for time-pressured correspondents—just complete the blanks to personalize the message and send along to a happy recipient. A charming marriage of contemporary styling and vintage format, Fill + Fold + Seal + Send Self-Mailers are the perfect way to stay in touch.
Knock Knock’s Self-Mailers provide a witty solution for time-pressured correspondents—just complete the blanks to personalize the message and send along to a happy recipient. A charming marriage of contemporary styling and vintage format, Fill + Fold + Seal + Send Self-Mailers are the perfect way to stay in touch.