That’s the official motto of the flat rate program, and it’s almost poetic. No rules about weight limits. No surprise fees when your package is a little heavier than expected. It’s the honest handshake of postal agreements.
Want to send a stack of old magazines to a friend across the country? Go for it. Need to return a bulky winter coat? You bet. The envelope becomes a challenge: "What's the heaviest thing I can legally squeeze in here?"
Usps Priority Mail Flat Rate Mailing Envelope | Detroit Chinatown
A Few Pro Tips (From a Casual Expert)
First, always use the "Legal Size" flat rate envelope if your stuff is long and skinny. It’s the same price as the regular one but has extra room for standard documents. Sneaky, but smart.
Second, don’t be afraid to tape the edges if it looks like it might burst. The envelope is sturdy, but a little extra reinforcement never hurt anyone. Just don’t add so much tape that it changes the shape—the post office gets grumpy about that.
