Mon, 04 May 2026 13:13:16 +0000

You’ll NEVER Guess These Envelope Sizes—They Affect Mailing Happiness! Mailing letters and packages isn’t just about throwing an envelope in the mailbox—it’s a science. From delivery accuracy to postage costs and, yes, overall mailing happiness, envelope size plays a much bigger role than most people realize. In fact, using the wrong envelope size can lead to delayed deliveries, increased postage, or even rejected mail. At You’ll NEVER Guess These Envelope Sizes—They Affect Mailing Happiness!, we’re breaking down the surprising world of envelope dimensions and why they matter more than you think. ### Why Envelope Size Matters for Mailing Success The envelope you choose isn’t just about looks—it impacts how smoothly your mail travels from one address to another. Professional postal services and even automated sorting machines rely on standardized letter dimensions to function efficiently. Using correct sizes ensures faster processing, fewer handling errors, and ultimately, happier mailing experiences.