Shipping zones explained
How carriers define distance-based pricing and what it means for you.
Distance bands
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US address formatting guidelines
Reduce delivery issues with standardized address lines.
ReferenceOversize and large package rules
Avoid cost spikes by staying under thresholds.
ReferenceLength + girth: how to measure packages
Avoid oversize fees by measuring correctly.
ReferenceSignature confirmation options: USPS, UPS, FedEx
Adult signature, direct signature, and standard options by carrier.
ReferenceUSPS Cubic pricing explained
When cubic tiers beat weight-based rates for small, dense packages.
ReferenceDIM divisor by carrier explained
Know which divisor applies and how it affects price.