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 of 2016, a 2.5 ounce envelope it would cost 93 cents (one Forever stamp plus two extra ounces).
how many stamps for a 3.4oz envelope
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.
It depends on tne weight of the envelope not the size.
4
For an envelope that weighs 5 ounces, you would need 5 Forever stamps. Forever stamps are typically for 1-ounce letters, so you would need to use multiple stamps to cover the additional weight.
I think you mean 9x12 envelope.
5 as of January 18, 2013.
To mail a 9x12 envelope weighing 3.8 ounces, you typically need two First-Class stamps, as the first ounce costs one stamp and each additional ounce costs an extra stamp. Since the envelope weighs 3.8 ounces, it falls into the 3-ounce rate category, which requires two stamps. Check with your local postal service for any changes in rates or requirements.
It only takes one for the first ounce. For additional weight, you will have to add additional stamps. Usually four sheets of paper in an envelope will need an extra stamp.
depends on the size and weight Right now stamps are 44 cents for every 10 pages of a normal Business Letter envelope. So if this is 10 pages and LESS you will need one 44 cent stamp. If it is more you will want to put extra stamps on it. Best thing to do take the letter to the post office and mail it if you can they will weigh it and give you an exact accurate weight to mail it. As long as it is in a business envelope, long envelope and not a manila envelope or box. It is that for 10 pages or LESS 44 cent stamp.
5 as of January 18, 2013.