The idea of designing return address labels depends on the user. If you have a business it is good to have a design that would fit into your type of business and would relate to your profession. If you are a doctor, a medical theme would fit your return address labels in a white envelope. Selecting a design is a matter of choice; however it pays to make your business known through your return address labels. It is one way of advertising your business to others. Return address labels are mainly used for mailing purposes and for labeling things, but an eye catching design is something better.
