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What is First Class Package Service?

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USPS First-Class Package Service offers the best rates for shipments weighing equal or less than 15.9 oz.

If your shipment is less than a pound and is being shipped in a custom box or envelope, First-Class Mail is the most affordable option for you. In most cases, delivery will be within three days.

First Class - Domestic

Best Option When: You are shipping lightweight packages.
Delivery Timeline: Domestic delivery averages 1-5 business days.
This is not a guaranteed service; delivery may be delayed.
Service Overview: Domestic rates are determined by package weight.
Delivery confirmation (tracking) is included for free on all domestic shipments, excluding the Large Envelope/Flat. Learn more
Signature confirmation available for added fee.
Domestic Shipment insurance available for an added fee.
Rates:
View the domestic rate table
Restrictions:
Maximum dimensions for domestic shipments: 22" x 18" x 15" (LxWxH)
Maximum weight for domestic shipments: up to 15.9 oz.
There are restrictions for mailing restricted, prohibited, and hazardous materials, including cigarettes and smokeless tobacco.  Learn more about restrictions.

First Class - International

Best Option When: You are shipping lightweight packages.
Delivery Timeline: International delivery times vary by destination. First Class Mail is not recommended if a timely delivery is important.
Service Overview: No additional confirmation options available on international shipments.
Rates: View the international rate tables:
Restrictions:

Maximum dimensions for international shipments: 24" Length, L+H+W= 36"

Maximum weight for international shipments: up to 4 lbs.
Some countries may have lower weight restrictions.  View Country-Specific Restrictions


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