USPS Service Changes on June 23, 2019 | Overview

Shipping carriers routinely update their products, services, and adjust rates.

The USPS is making changes to services on June 23, 2019:

  • New weight limits imposed on First-Class Mail International service.
  • New dimensional weight rules for domestic Priority Mail, Priority Mail Express, and Parcel Select Ground.

First-Class Mail International weight limits:

First-Class Mail International is USPS' service for sending letters and flat envelopes to international countries.

A popular First-Class Mail International package type is the large envelope / flat. The USPS approves large envelopes for sending documents, only. Yet many merchants need to send lightweight merchandise to international buyers. And so, ShippingEasy also provides access to consolidator services that allow merchandise in large envelope flats. Learn how to send merchandise in a flat envelope.

On June 23, 2019, the USPS will be changing the weight limits for their First-Class Mail International service. Keep in mind, the rate tables will not be changing.

Prior to the June 2019 changes:

Previously, the USPS First-Class Mail International was eligible for flats up to 4 lbs (64 ounces).

After June 23, 2019:

With the service changes, USPS First-Class Mail International can only be used to send documents weighing less than 1 lb (16 ounces).

ShippingEasy subscribers who use consolidator services to send merchandise via First-Class Mail International will enjoy weight limit increases. Envelopes up to 4.4 lbs (70 ounces) can be shipped via the "First-Class Mail International - Merchandise" service. Learn more about First-Class Mail International for merchandise.

Affects of new First-Class Mail International weight limits:

The changes to USPS First-Class Mail International mean that large envelope flats can only be used for shipping documents up to 15.999 ounces. Rate tables are not changing. Although, individuals may find their postage costs for shipping documents increase. Many shippers will need to use other services that support shipments over 1 lb. Consider USPS First-Class Package International Service as an alternative.

On the other hand, ShippingEasy subscribers may expand their use of 'First-Class Mail International - Merchandise' to shipments up to 70 ounces.


Dimensional (DIM) weight service changes:

Dimensional (DIM) weight is a pricing model that uses the volume - length x width x height - of the package to find postage costs. DIM weight applies to larger packages with lower weights. This helps carriers manage the two main factors that affect shipping costs - package dimensions and weight. Learn more about dimensional (DIM) weight.

The USPS has used dimensional weight principles to a limited degree for a while. Until the rate changes in January 2019, Balloon pricing was used for domestic Priority Mail, Priority Mail Express, and Parcel Select Ground. Balloon pricing enabled USPS to charge more for very large, but light weight shipments. This pricing system was retired to make way for the industry standard of DIM weight.

On June 23, 2019, the USPS will be changing the rules for DIM weight eligibility. Rate tables will not be changing.

Prior to the June 2019 changes:

USPS has been assessing DIM weight pricing for domestic Priority Mail.

Only the specific Zones 5-9 have been subject to DIM weight pricing.

DIM weight eligible packages are greater than 1 cubic foot (1728 cubic inches).

USPS has used a DIM divisor of 194.

After June 23, 2019:

USPS will continue to assess DIM weight for domestic Priority Mail.

In addition, USPS will assess DIM weight for domestic Priority Mail Express and Parcel Select Ground.

Eligible zones are changing. DIM weight pricing will extend to all zones.

As before, parcels larger than 1 cubic foot (1728 cubic inches) may qualify for DIM weight.

The DIM divisor is changing to 166.

Affects of DIM weight changes:

After these changes, more Priority Mail, Priority Mail Express, and Parcel Select packages will undergo the DIM weight test. Also, with the divisor getting smaller, it will be more expensive to ship DIM weight qualified parcels.

Finding DIM weight on qualifying packages:

Using your package dimensions, ShippingEasy will automatically determine if your shipments qualify for DIM weight pricing. It is easy to compare rates between different packages too. Learn how to save favorite packaging.

If you would like to run the numbers yourself, use this flow chart to find out if your package will be assessed the DIM weight or actual weight price.


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