Can you put packages under 16oz in regular mail slot

According to the United States Postal Service (USPS), packages under 16 ounces can be sent through the regular mail slot, also known as the "letter slot" or "flat rate envelope slot". This is because the USPS considers packages under 16 ounces to be "letters" or "flats" for the purpose of mail sorting and delivery.

Here are some guidelines to keep in mind:

  1. Weight: The package must weigh 16 ounces or less.
  2. Size: The package must fit through the regular mail slot, which is approximately 6.125 inches high, 3.5 inches wide, and 0.5 inches thick.
  3. Shape: The package can be rectangular, square, or irregularly shaped, as long as it fits through the mail slot.
  4. Content: The package can contain letters, documents, or small items, such as jewelry, coins, or small toys.

Some examples of packages that can be sent through the regular mail slot include:

However, if your package is larger, heavier, or has a more unusual shape, you may need to use a different type of mail service, such as Priority Mail or Parcel Post, which requires a larger envelope or box.

Remember to always check with your local post office or the USPS website for the most up-to-date information on mail services and regulations.