3 1/2" x 5"
The cost will depend upon the size and also the weight of the envelope. Also if it is first class or second class mail, and the country you live in. If you are in UK you can go to Royal Mail website and get the exact price of the cost but you need the weight of the envelope.
The cheapest way to ship a quarter would be in a standard letter size envelope through first class mail. It would cost you the price of one first class stamp.
Postage is determined by weight and by size. An envelope with three pieces of normal paper can normally be sent with one first class postage stamp. Additional stamps may be required based on additional ounces and on the size of the envelope.
One First Class is adequate if it is a standard size envelope of one ounce or less.
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.
Yes, at least in the UK, you can post any letter or parcel first class provided you pay the correct postage charge for the size/weight of the letter/package.
28p
Postage from the US to Canada for a standard letter is 75 cents.
The US Postal rates changed starting January 26, 2014. For a first class small personal envelope or business letter envelope, or standard retail greeting card size, the cost is $0.49 for the first ounce and $0.21 for additional ounces up to 3.5 ounces if sent to any zip code within the United States of America. As you can see, these prices include thickness as well as size of the envelope *Overseas Rates differ from these figures.See this handy chart.
What is the standard-size large envelope?
First class mail is delivered in 3 to 5 days