depends on how many sheets u put inside..
At least 94 cents (two Forever stamps), and possibly more depending on weight.
The postage for a 6 x 9 envelope would depend on the weight of it.
The postage for a 6 x 9 envelope would depend on the weight of it.
Since the envelope is 5.25 X 5.25 inches square, the postage is .70 cents for first class. This rate is for an envelope that weighs .5 ounces. The postage may be higher depending on the weight of the envelope.
Over 9000.
.44
.44
.44
75
This would move you letter into the "Flat Class" and can be mailed via 1st class as long as it weighs under 15oz. Your price would be about $.90.
45 cents
For flat paper items, postage goes by weight, not by size.