Use the table of contents below to navigate to specific sections of this article:
- Ground Advantage versus Priority Mail
- Packaging Effects on Rates
- Overages & Adjustments
- International Shipping Restrictions
CommentSold Shipping rates are determined by the carrier (USPS & UPS). CommentSold does not make any profit from shipping labels or shipping adjustments.
| Note: While our fulfillment system may not always require products to have weights depending on the package type and carrier, we recommend ensuring all products have a proper weight listed in the product details to ensure your shipping labels are calculated correctly and to avoid shipping adjustments from the carrier. |
Ground Advantage versus Priority Mail
Ground Advantage will be the preferred option whenever it is cheaper than Priority Mail and the shipment qualifies for Ground Advantage.
USPS Ground Advantage offers better rates for many shipments compared to Priority Mail, allowing you to save on shipping costs.
Read more about Ground Advantage here
Toggle off USPS Ground Advantage
If you prefer to use Priority Mail, contact CommentSold Support to adjust your account settings.
This can only be adjusted for packages greater than 1 pound (lb). There is no way to toggle off Ground Advantage for packages less than 1lb because of USPS requirements.
Packaging Effects on Rates
Shipping rate seem high? The size, packaging type, or dimensions of your package may be pushing your package into a different rate bracket.
USPS Package Rules
When shipping oversized packages via USPS, you may pay a higher rate. These rates take into account the overall size of the package rather than the weight. USPS uses Dimensional (DIM) weight to accommodate lighter packages that take up extra cargo space. USPS considers oversized packages to be over 108 inches but not more than 130 inches in combined length and girth. Read more about USPS Dimensional Rate policies here.
USPS Flat Rate packaging and Regional Rate boxes are excluded from using dimensional weight.
To be eligible for soft packaging (aka poly mailer) the sum of the length and width cannot exceed 36 inches.
The longest dimension cannot exceed 18 inches. If it does, it will qualify for dimensional weight instead.
Packages over 1 cubic foot (1728 cubic inches) will be priced according to dimensional weight.
- To calculate if a package is over one cubic foot, multiply the L x W x H. If the result is 1728 or higher, Dimensional Weight pricing may apply.
- The USPS Dimensional weight formula is L x W x H/166. Per USPS requirements, you will be charged whatever is higher, the DIM weight or the actual weight of the package.
Overages & Adjustments
How it works
As part of USPS random package audits, USPS may review a percentage of packages to determine if accurate postage is being paid. If packages are under or over, USPS will use the average under/overpayment to apply retroactively to other label purchases in a period of time. This is charged to your account.
You can view these charges in your account here.
Read more details about the adjustment process and reasons here: https://faq.usps.com/s/article/Automated-Package-Verification-Program
International Shipping Restrictions
Polymailer packaging cannot be used to ship internationally.