$3.29
$0.61
A standard size envelope of one ounce or less is delivered within the US for 44 cents.
About six dollars
It 44 cents per ounce. Ten or less is 88 cents
For the first ounce it will be 88 cents. There is an additional charge for the larger size. Each additional ounce is 17 cents.
The first ounce is 44 cents. Each additional ounce would be 17 cents. That would total $1.97 in postage.
The first ounce is 44 cents. Each additional ounce is 17 cents. That would be 78 cents to mail it anywhere inside the US.
Those dimensions make it a large envelope, so postage starts at 94 cents (two Forever stamps) for the first ounce, and more if it's heavier.
The postage rate to mail a 6x8 envelope in the United States as of 2014 is $0.44 if it is within the regulated weight. Additional costs may occur if it weighs more.
From where to where .
$0.88 for under an ounce, $1.05 for between one and two ounces. Add $0.17 for each additional ounce.
Enough to cover the weight of the letter. One first class stamp will mail a one ounce envelope.