Mailbox Lettering Kit. With lettering on both sides of your mailbox, people will be able to find you no matter which side of the street they are driving on. These are bold enough to be visible at a distance, and durable enough to last. These letters are proudly made in the USA. Easy to apply. Mailbox and post, are not included. Dimensions: 3" L x 3" W x 1.75" H; 1/16 lbs.