One C4 weighs about 1 and a half pounds in call of duty.
The amount of stamps needed for an envelope is determined by weight. Weigh your a4 envelope and you will know how much postage is needed.
area of envelope = l Xb =8.5 X11 =93.5 inch^2
The cost to mail a manila envelope will depend on the size of the envelope and the weight of the envelope. The average cost to mail a manila envelope that is 8"X11" is about $2 if the contents weigh less than one pound.
A scale
It depends on how much they weigh. You can check with the carrier how much it will cost once you know how heavy they are.
As long as the envelope doesn't weigh too much (If you're just mailing paper, then it probably doesn't) then no it doesn't cost more.
Postage depends on which country you live in, how much the envelope and contents weigh, and where you are sending the envelope to. You'll need to include all that in your question to get the correct answer - or you could just go to your local postal website and get the answer from the experts...
A typical 5x7 photo print weighs around 0.4 to 0.5 ounces, while a standard envelope for that size picture adds approximately 0.5 ounces. Therefore, the total weight of a 5x7 picture and envelope combined is roughly 0.9 to 1 ounce. This can vary slightly depending on the thickness of the paper and the envelope material.
C4 Sport contains 1 gram of creatine nitrate per serving.
postage needed for A09 envelope
C4 Sport contains 1.5 grams of creatine nitrate per serving.