Pieces to be mailed must be evaluated by the following criteria:
FLEXIBILITY/BENDABILITY (vs. stiffness)
Minimum size of any mail is 5" long x 3+1/2" high
POST CARDS can not exceed 6" wide x 4+1/4" high
FIRST CLASS cards and envelopes can be up to 11+1/2" wide x 6+1/8"high.
Larger envelopes up to 15" long x 12" high with a maximum thickness of 3/4" must be flexible to go as FLATS.
Non-flexible and over 3/4" thickness go at Parcel Rate.
The postal clerks use a 1/4" slot for envelopes which must be uniform in thickness and flexible.
A 3/4" slot is for flats which must be flexible. Beyond that, your mail becomes a "package" and costs more to send out.
Automated sorting machines will bend your mail around a 45-degree curve at lightning-fast speeds. Any loose collage elements may lift off or be damaged unless your art is sent protected.
First Class Mail (proper size and thickness) up to 1 ounce will cost 63-cents as of January 23, 2023. A FOREVER STAMP will automatically assume the new value.
The second ounce still costs 24-cents. Each additional ounce requires another 24-cents.
POST CARD postage costs 48--cents unless size exceeds 6" x 4+1/4". There is a minimum size limit or your will probably need to be put in an envelope for protection.
I have just become aware of this factor. If the address side of your mail is shiny like plastic, the orange or black sorting bar code ink will not stick. Reinforcing edges of envelopes with tape is fine, but covering the bottom 1/2" of either a post card or envelope with anything (TAPE, INK, PAINT, COLLAGE, WRITING, STICKERS, etc.) may cause a problem. Much of my mail arrives with a white strip at the bottom with a black bar code on it. (Don't add your own white sticker to out-going mail, my postmistress says; allow the postal sorting system to do so if needed.)
All of the below may require nonmachinable postage.
- plastic bags/envelopes
- envelopes encased in packaging tape
- post cards enclosed in cellophane sleeves
- thicker, heavier, larger, odd-shaped (i.e. Square), rigid mail
- envelopes and post cards that have any art or writing below the address label
NOTE: Any mail art not standard thickness, weight, size or shape should be handed over the counter to a postal clerk for weighing and measuring before affixing postage. If you choose to drop your mail into an outside drop box (it could get damp or wet), or an inside mail slot, or have a postal carrier pick up your mail, your mail might bounce back if you haven't considered the factors above. Or your recipient may have to pay any postage shortages when he/she receives it.
PACKAGES with postage stamps on them MUST be handed over a postal counter. This does not apply to postage printed out on an official postage strip.
--Unless you cover up those metal tabs under the flap of a brown Kraft or large white envelope, your mail will probably require non-machinable postage of at least -cents (or a FOREVER stamp plus -cents) postage. Larger envelopes require even more postage.
--Addressing your mail sideways causes it to require non-machinable postage.
--Dropping your group swap mail art in an outside collection box or a slot means it will NOT get presorted, and this could lead to delays, damage (think SNOW or RAIN) or postage due when swap hosts receive your mail. Best scenario: hand it over the counter if at all possible...
--When repurposing envelopes which have already gone through the mail, unless you cover the lll ll llllll lll llllll sorting neon orange or black bar codes near the bottom (back AND front), your re-used envelope may bounce back to you, or to whomever it was originally addressed to.
POST CARDS (and other mail) are read from the bottom up by those impersonal automated sorting machines. If you put your return address at the bottom left on a post card, you may very well receive your own art back through the mail.
*****Return addresses are supposed to be in the top left-hand corner, so I was told. I do my best to relocate them when mail art comes in with labels along the left bottom edge.
Anything weighing over 10 ounces
Anything thicker than 1/2"
and having regular postage stamps on it,
May not be mailed out from a mail box or postal drop
It must be handed across a postal counter,
have postal strips affixed from an approvedonline source of US postage.
As of JANUARY 2023 postal rates have increased. There is an "extra ounce" butterfly stamp worth 87? cents , and there is an "UNMACHINABLE" butterfly stamp now worth 87?-cents. Don't ask me, it wasn't my idea :(
Corrections or additions may be made to this information as needed.
Corrections or additions may be made to this information as needed.
Honi you are becoming an expert! I did not know about the problems if an address or the bottom portion is covered up. When you mention presorting, are you saying we should always go to a post office to drop our mail?
As far as I know, it's okay to cover the address label with tape. If you want problem-free mailing, I suggest you take any potentially non-conforming mail to a friendly, knowledgeable postal employee who can accurately evaluate your postage needs. Hope that helps? Honi
The illustration on this page supports the return address on the upper left :-)
Also, to keep address formatting up to date, USPS asks we
-USE ALL CAPS
-OMIT PUNCTUATION, including commas and periods (unlike we were all taught years ago)
-USE THE ZIP+4 whenever possible
I took my latest mail art postcard to our local post office in a cellophane bag, and expected to pay for the non-machineable rate. To my surprise, both clerks agreed that an ordinary post card stamp was sufficient, so I bought one then and there, affixed it, and now hope it makes it to its destination! At other times I've found our local Anacortes post office a bit lacking in knowledge of international postage rules, such as the Danish way of handwritten codes in the place of a stamp, when people have paid for the postage remotely.
Hi Jan, If you sent it to me at my post office, I would end up paying the difference between what you put on your cellophane sleeve, and the 70-cent non-machinable rate before I could receive your art mailing. It has happened before. It's a fact that there is no continuity between postal offices, which makes my job harder than it should be. Honi
Wow, that is really tough! Yes, similarly, I've had to pay the whole $2 and something for Danish mail even though it's been paid for on the other end. I even talked to our postmaster about this, who said he'd look into it, and never heard back.
Luckily the one I just mailed with their agreement on postcard rate wasn't an MMSA exchange. I'll try to remember to include the 70 cent rate from now on if I use a cellophane sleeve. Always and again, Honi, thank you so much for all you do for this community!
About those CELLOPHANE SLEEVES: Just talked to my friendly postmistress and she reinforced that the stamp HAS to be postmarked or the receiver will end up paying to retrieve his/her mail. So if you use sleeves, either put your postage on the OUTSIDE of the cellophane, or ir the stamps are on the inside, take it to the PO to be "franked" and THEN seal the cellophane. Honi
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