Letters, large or thick envelopes, tubes, and packages containing mailable items can be sent using Express Mail. This guaranteed service includes tracking and insurance up to $100. Delivery to most destinations is available 365 days a year, with no extra charge for Saturday, Sunday, and holiday delivery.
Large or thick envelopes, tubes, and packages containing mailable items can be sent using Priority Mail. This service is typically used to send documents, gifts, and merchandise.
Postcards, letters, large envelopes, and small packages can be sent using First-Class Mail. This service is typically used for personal and business correspondence and bills.
Small and large packages, thick envelopes, and tubes containing gifts and merchandise can be sent using Parcel Post.
Small and large packages, thick envelopes, and tubes can be sent using Media Mail. Contents are limited to books, film, manuscripts, sound recordings, video tapes, and computer media (such as CDs, DVDs, and diskettes). Sometimes called "Book Rate," Media Mail cannot contain advertising. Media Mail is less expensive than Parcel Post.
Bound Printed Matter
Small and large packages and thick envelopes can be sent using this service. Contents are limited to permanently bound sheets of directory, advertising, or editorial matter, such as catalogs or phone books. Bound Printed Matter is less expensive than Parcel Post.