Put it in an 8x11 envelope and if it weighs less than 13 ozs., you’ll save even more.
I read a science fiction story many years in a book called “100 Great Science Fiction Short Short Stories” Edited by Isaac Asimov (1977) written by Hayford Peirce called “Mail Supremacy”, on how mail arrives quicker the longer the distance it is sent.
A person on a lark addressed a envelope to Alpha Centauri and received an instant reply stating he had discovered the secret to traveling among the stars.
Mail Supremacy (shortstory, 1975) – Hayford Peirce
Chap Foey Rider recalls the days of express mail service, twice per days mail services, and ever prompt deliveries. At his main offices in New York, Chap receives an in-own letter within eight days yet a letter from Tahiti in only three days. As a test, he has his office in Bangkok send a letter to Lima 12,244 miles away—it arrives in one day. His curiosity piqued, Chap addressed and mails a letter to the Supreme Galactic Council regarding its General Post Office.
Review I found:
Hayford Peirce’s “Mail Supremacy” is a short, light-hearted story in which Chap Foey Rider begins to wonder about the mail system and how it works. Rider, who runs an import company in New York, laments the loss of multiple deliveries a day and further notes that it seems that something mailed from a shorter distance takes longer to reach its destination than something mailed from a longer distance. He is more likely to receive a letter from his office in Los Angeles first than a letter mailed from nearby Boston.
He begins to test this by having his office managers mail letters and tracking their time in transit. Once he is sure that letters mailed far distances are being delivered quickly, he takes it to the illogical extreme and tries to mail letters to Alpha Centauri.