After 3.5 ounces, the item moves up to large envelope rates. The current rate as of 2016 for an 11 ounce large envelope is $3.18.
The first ounce or less: 44 centsMore than one ounce but not over 2 ounces: 61 centsMore than two ounces but not over 3 ounces: 78 centsMore than three ounces but not over 3.5 ounces: 95 centsIf over 3.5 ounces, the letter is subject to the large envelope rate.As you letter weighs 4 ounces, but less than 5 ounces, it is subject to the large envelope rate. The large envelop rate for four ounces is $1.39. Which means you will need to use 4 forever stamps (44 cent stamps).
The cost to mail a 2-ounce medium envelope will depend on the postage rate for that particular envelope type (e.g., First-Class, Priority Mail). You can check the current postage rates on the official website of the postal service you are using.
At that weight, it would be classified as a large envelope rather than a letter. As of 2016, the rate is $3.04.
Letters Weight Not OverPrice1 ounce$0.442 ounces$0.613 ounces$0.783.5 ounces$0.95
From May 2009 to late 2011 in the US, the one-ounce first class rate was 44 cents. The rate for a second ounce was only 17 cents, for a total of 61 cents. (Assuming that the letter is neither a large envelope or a thick envelope, which are charged at different base rates.) Major mailers were eligible for reduced rates for pieces between 1 and 2 ounces when they included a return reply envelope.
The postage is $1.76 for a standard letter envelope of 2 oz.
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.
an 8x8 envelope is charged "parcel rate"..because it is square and over the letter size dimension...cant be a "large envelope" because it is not rectangular
$.80 domestic $1.10 international The price goes up the more it weighs (2 ounces and under is fine).
For most destinations outside the U.S., Canada, and Mexico, a letter weighing 4.3 ounces will need $5.45 in US postage for a "First-Class Mail International Large Envelope" rate. Priority Mail International, GXG, or Priority Mail Express International carry higher rates.
Repetition rate of an AM envelope refers to the frequency of the modulating signal thus the shape of the envelope is identical to the shape of the modulating signal.