First-Class Mail

First-Class Mail includes all personal correspondence, all bills and statements of accounts, all matter sealed or otherwise closed against inspection, and matter wholly or partly in writing or typewriting. Any mailable items may be sent as First-Class Mail. Each piece must weigh 13 oz or less. Pieces over 13 oz can be sent as Priority Mail.

Retail Letters and Cards

Weight not
over (oz)
1 $0.49
2 0.71
3 0.93
3.5 1.15