The great man and women at the Post Office work hard to deliver our mail throughout the year. Show your appreciation and put a smile on your mail carrier’s face with a Thank You decal displayed inside your mailbox. Let’s all show our gratitude to the Post Office Workers. A portion of the proceeds will go to supporting small businesses. Decal Size: 4.5″ W x 2.25″ H. FREE SHIPPING. Most orders ship within 1-3 business days.