First Class Mail is the most popular and economical way to send items through USPS. You can send standard postcards, letters and large envelopes and small packages up to 15.99 ounces using First Class Mail. If your First Class package is over 15.99 ounces, you must upgrade the mail class to Priority Mail.
While there are no guaranteed delivery times for First Class Mail, letters or packages typically take two to three days to arrive at their final destination in the U.S.
An approved licensed vendor of the USPS, Stamps.com allows you to buy and print mailing and shipping labels for all USPS mail classes using a standard ink-jet or laser printer. There is a monthly service fee of $15.99 to use the service.
|Mail Item||Width||Length||Weight||First Class Rate - 1 oz.|
|Postcard||4.5″ max||6.00″ max||Up to 1 oz||$0.35|
|Letter||6.125″ max||11.5″ max||Up to 3.50 oz||$0.47|
|Large Flat Envelope||12.00″ max||15.00″ max||Up to 13.00 oz||$1.00|
|Small Packages||18.00″ max||22.00″ max||Up to 15.99 oz||$2.66|
You can attach stamps to large envelopes and small packages to be sent through First Class Mail as long as you’ve met USPS’s weight restrictions. It costs $1.00 to send the first ounce of a large envelope and $2.66 for the first 3 ounces of a small package. Letters that can’t be sent through the Post Office’s automated machines have a $0.21 postage surcharge; the shape of the letter determines whether or not it is subject to this surcharge or not. Find out more about how shape affects the price of First Class Mail.
You can purchase additional services for your First Class Mail item. Certified Mail is available for all pieces of mail sent through First Class Mail. USPS Tracking and Signature Confirmation only are available for small packages sent through First Class Mail. If you are sending a post card, Registered Mail, Return Receipt, insurance, restricted delivery and COD are not available.
Print Exact Postage: Stamps.com also gives you the flexibility to print the exact postage amount on every stamp, whether it be one ounce or five ounces. Additionally, we offer free software upgrades each year when the USPS performs their annual rate adjustment, ensuring that you'll never need one or two cents postage stamps again.
Discounted USPS Tracking: Stamps.com offers free USPS Tracking for small parcels sent through First Class Package Service.