Shipping zones explained
How carriers define distance-based pricing and what it means for you.
Distance bands
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Oversize and large package rules
Avoid cost spikes by staying under thresholds.
ReferenceUPS Additional Handling: rules and thresholds
Avoid surprise fees by staying below triggers.
ReferenceWhat affects shipping price? The full list of factors
Weight, dimensions, zones, surcharges, and address type.
ReferenceUSPS non‑machinable surcharge explained
When it applies and how to avoid it.
ReferenceShipping glossary (A–Z)
Plain‑English definitions with examples and links.
ReferenceDIM divisor by carrier explained
Know which divisor applies and how it affects price.