Mail in order

Here is a list of common mail items in order from most common to least common:

1. Letters: Personal correspondence, bills, and other written communications.
2. Postcards: Short, flat cards with a message and a stamp.
3. Packages: Boxes or envelopes containing goods, such as gifts, merchandise, or online purchases.
4. Envelopes: Folded paper containers for letters, bills, and other documents.
5. Flat Rate Envelopes: Pre-paid envelopes for sending documents, such as tax returns or legal documents.
6. Priority Mail: Expedited shipping for packages and envelopes, with tracking and insurance.
7. Certified Mail: Mailed items with proof of delivery and a signature upon receipt.
8. Registered Mail: Mailed items with tracking, insurance, and a signature upon receipt.
9. International Mail: Mail sent to or from other countries, often with customs forms and additional fees.
10. Specialty Mail: Items that require special handling, such as hazardous materials, live animals, or perishable goods.

Keep in mind that the types and frequencies of mail items can vary depending on the country, region, or industry.