the USPS charges by weight and not by size
$3.29
1.35
At that size and weight, it would cost $2.20 (as of 2016).
To mail a 9 by 12 envelope within the United States, you typically need two Forever stamps, as the cost for mailing a large envelope (flats) is higher than a standard letter. As of my last update, the rate for a first-class large envelope starts at the price of a single Forever stamp, and additional postage is required for extra weight. Always check the current USPS rates, as they may change.
You will need postage for the weight of the envelope (probably 2 ounces, for 4 sheets of paper in a 10x13 envelope), plus a surcharge for the size of the envelope. Best guess: $1.19 for first class mail within the United States, as of Feb. 2014.
The cost to mail a magazine generally depends on the weight, size, and destination of the magazine. Rates can vary based on the postal service provider and the specific mailing options chosen. It is recommended to check with your local postal service for accurate pricing.
Yes, it is the same for the same weight. Both are considered 'oversized' mail or 'flats' and cost more than a normal business envelope. the current rate would be 88 cents for the first ounce and 17 cents for each additional ounce.
ask at the post office
The first ounce will cost 88 cents. Each additional ounce will cost 17 cents. 6 pages of regular computer paper is about 1 ounce.
Prior to 12 May it was 41 cents and after 12 May it was 42 cents.
$0.88 for under an ounce, $1.05 for between one and two ounces. Add $0.17 for each additional ounce.
In the UK the Royal Mail charge £1.10 second class, £1.20 First Class. Overseas delivery will be higher.