If you’re wondering how heavy a letter can be for a First Class stamp, you’ve come to the right place
The USPS gives postal services a bit of leeway when it comes to how heavy first class letters can be but if your letter is too heavy, you may have to mail it
A first class letter may weigh no more than 35 ounces per piece of mail
If you need to send papers or documentation weighing more than 35 ounces, it’s a good strategy to split your mail into several individual envelopes with your own stamps
Learn more about the difference between mailing and delivery
The number of First Class (also called “Forever”) stamps you need to send a letter depends on how much your letter weighs
As a rule, one First Class stamp corresponds to the cost of sending one (1) ounce of mail
So, if your letter weighs two (2) ounces, you need two Forever stamps
If your letter reaches the maximum amount of 35 ounces, the USPS will likely require a total of four Forever stamps, as it requires its own postage stamp to cover those extra half ounces
Forever stamps are currently worth 58 cents each
You use these stamps for first class mail, but be aware that the USPS raises the price of stamps from time to time
However, once you buy them, you can literally use them forever!
This means you can buy a Forever stamp today for 58 cents and use it ten or fifteen years from now to send a first class letter
You can get rolls of Forever stamps from a wide variety of locations, including select city pharmacies, your local post office, and of course, the USPS website