How much does first class mail weigh

The weight limit for First Class Mail in the United States is 13 ounces (369 grams). This means that any letter or package weighing 13 ounces or less can be sent as First Class Mail.

Here are some examples of items that can be sent as First Class Mail:

• A standard letter or postcard weighing up to 1 ounce (28 grams)
• A small package or envelope weighing up to 13 ounces (369 grams)
• A small book or magazine weighing up to 13 ounces (369 grams)

If your item weighs more than 13 ounces, you will need to use a different type of mail service, such as Priority Mail or Parcel Post.