Letter Size Envelope How Many Stamps. Please enable it to continue. Community answer there are a few variables that will determine the postage price, like its origin and destination, which level of service you use (ground, priority, first class, etc.) and the size of your envelope.
I had stuffed envelopes weighed at th. One forever stamp or 1 first class letter stamp at the top right corner of an envelope is sufficient to send a letter. There are also extra postage fees for each additional ounce.
Each additional ounce is 22 cents.
I had stuffed envelopes weighed at th. How many stamps you need to mail your letter depends on where it's going, its size, and its weight. For mailing contents such as a4 sized documents, dvds, certificates, large greeting cards and magazines you would need to send as a large letter. The most popular size is the #10 envelope (measuring 4 1/8″ by 9 1/2″), though varied sizes and styles are available, such as some with additional security features or plastic windows.