cheapest way to ship a 6oz envelope besides first class

[richard1rst]

Sorry, but that does no exist.

[fab_finds4u]

Sticking a stamp on an envelope offers no seller protection against a not received claim.

To be covered stick a packing peanut or a tissue in the  envelope to make it at least 3/4 " thick and pay for a First Class Package.

[gemini_variety]

The package doesn't have to be 3/4" thick to buy and ship a First Class Package.  They aren't going to return the package and make you purchase a stamp instead if it's too thin.  I've ship envelopes between 1/4" - 1/2" daily for several years now using First Class Package without any hiccups.  

If the package is over a certain thickness, a stamp cannot be used and First Class Package must be purchased, but First Class can be used for any size package under 1 lb.

[richard1rst]

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@gemini_variety wrote:

The package doesn't have to be 3/4" thick to buy and ship a First Class Package.  They aren't going to return the package and make you purchase a stamp instead if it's too thin.  I've ship envelopes between 1/4" - 1/2" daily for several years now using First Class Package without any hiccups.  

If the package is over a certain thickness, a stamp cannot be used and First Class Package must be purchased, but First Class can be used for any size package under 1 lb.

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Well, actually I sent out a 6x9 padded envelope without any extra "padding" to increase the thickness because I thought as you that it would go through OK.

SURPRISE - my buyers post office crossed out "first class package" with a broad line and the notation "NO". Then they charged the buyer postage due claiming that it was a "priority mail flat" ($5.00 and change extra as I recall).  Now in fairness most of the 6x9s I send are in fact thicker due to their contents. This one happened to be an embroidered patch and I just didn't see the need to make a fuss. I don't do it that way any more.

I remember seeing a post on these boards a few days ago from another poster that they had the same thing happen to them.

SO - watch the thickness as well as the weight.

[nobody*s_perfect]

A piece is considered to be a First Class package rather than as a flat if it is more than 3/4 inch thick OR rigid OR "uneven thickness," which USPS defines as a variation of more than 1/4 inch. So, next time you want to mail a patch as a FC package, make it over 3/4 inch thick OR put a couple sheets of cardboard in there; the postage cost is the same for any weight up to 4 ounces.

https://pe.usps.com/text/dmm300/201.htm#ep1096318