What is the minimum size envelope that can be mailed with usps?

Question

I'm mailing a mass amount of very small cards.... What is the smallest size the post office will accept? The USPS website was very disappointing.

Answer 1

when you say small cards do you mean a small greeting card like a birth announcement (in an envelope) or do you mean a post card?
First-Class letter dimensions:

Rectangular
At least 3-1/2 inches high X 5 inches long X .007 inch thick
No more than 6-1/8 inches high X 11-1/2 inches long X 1/4 inch thick
Maximum weight is 3.5 ounces
Letters that are considered nonmachinable are subject to a surcharge.
Length is the dimension parallel to the address.

To qualify for First-Class Mail card rates, a card must be:

• Rectangular
• At least 3-1/2 inches high X 5 inches long X 0.007 inch thick
• No more than 4-1/4 inches high X 6 inches long X 0.016 inch thick

Length is the longest dimension parallel to the address.
Oversized cards will be charged as a letter or large envelope depending on the size.

Answer 2

Usps Envelope Size

Answer 3

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RE:
What is the minimum size envelope that can be mailed with usps?
I'm mailing a mass amount of very small cards.... What is the smallest size the post office will accept? The USPS website was very disappointing.

Answer 4

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The minimum dimensions for a parcel would be one that exceeds the maximum dimension for a Letter or a Flat. Maximum size for Letters are 6 1/8"x11 1/2"x1/4". Maximum size for Flats/Large Envelope are 12"x15"x3/4". Flats must also be flexible and uniform in thickness. I am not sure what "loophole" you think you have found but this has been the standard for several years. I would absolutely discourage you from using ordinary envelopes to send something that needs to be a Parcel. The paper is just not sturdy enough to consistently contain contents other than paper. You are already paying the Parcel Postage so any increase in cost would not be because of Postage, unless you go over 3 oz. If you insist on using an ordinary envelope, the easiest way to make it qualify as a parcel is to insert something like a 1/2" square of styrofoam or a piece of bubble wrap to make the envelope thicker than 1/4". I understand that you want to be cheap about this but a better, safer practice would be to invest in some 6"x9" manila type of envelope. The paper is a bit sturdier. This would also allow for you to use a slightly larger or thicker piece af material to puff the thing up to be thicker than 3/4". The thing you are trying to do is something that people have been trying to do since Delivery Confirmation became available for First Class Mail Parcels. It is not enough that you pay the rate of postage for a Parcel. Your item MUST qualify as a Parcel. Pay no mind if fir3bu1k happens to show his pimply acne scarred face on here, but take anything that he may say as being very biased by his hatred for me and the USPS. Just the atypical troll. Good Luck 07/03/12 What is truly idiotic is that someone wouldn't read the question before spouting off silliness. The question related to doing this as inexpensively as possible. Somehow, I learned in 2nd Grade math that around $1.83 is a lot less than $2.95 plus postage. Now you can see the utter contempt this bone throwing primate has for the members of this fine community. Just report this neanderthal to the Answers Team for his trolling behavior or, at the very least, make sure that you give a thumbs down to the alleged answer to offset the two or three thumbs up he gives himself with the multiple IDs. He also uses the multiple IDs to put down two or three Best Answer votes for himself. You see, his sole purpose is to cyberstalk me and give multiple low ratings to any answer I give. Considering this knucklehead couldn't even pass a simple entrance exam to be hired by the Post Office, he has this big ax to grind against anyone that is superior to him in every way. Just swat this buffoon aside as you would a pesky gnat. You'll be further ahead that way.

Answer 5

As stated above...
the USPS website is quite clear, thank you!

Answer 6

what is the maximum dimensions for first class international