A standard business sized envelope size is 4 1/8 inches by 9 1/2 inches. One could purchase standard envelopes at the post office or at a stationary store.
Standard envelope sizes do vary from country to country. The term standard really only applies to the country you are in. International postage does not have a standard size. You'll have to find out size specifics from a country's postal service.
What is the standard-size large envelope?
The size of an envelope can vary, but a common standard size for a business envelope (No. 10) is 4.125 inches in width and 9.5 inches in length. Other envelope sizes exist, such as A4 or C5 envelopes, which have different dimensions. It's essential to choose the right envelope size based on the contents you need to send.
A website called paper-papers gives the most detailed information on envelopes on the web. There is a list of sizes and types that includes pictures next to the measurements and suggested enclosures.
The standard size business envelope is the number ten. The number ten envelope is open sided with a commercial style flap.
One can find charts for envelope sizes on stationery manufacturers websites such as Avery. One can also find charts for postage costs dependent on sizes on the Royal Mail website.
There are lots of different sizes of shipping packages. You can choose from: Letter, Large Envelope, thick envelope, Package, Large Package and Irregular packages.
The standard size of a passport renewal envelope is 9 inches by 12 inches.
The website Universal Printing has a graph that shows the different envelope sizes, names and measurements. This is a good place to look to figure out the differences in those sizes and which one you need.
4" by 9"
When addressing a standard envelope, the correct location for the return address is the upper left corner of the envelope.
An A6 envelope is in between an A5 envelope and an A7 envelope regarding sizes. Generally, an A6 envelope is 4 3/4'' x 6 1.2''. You will be able to find these at most stationary stores with the dimensions on them.