Amazon determines available shipping methods based on the shipment details entered during the workflow.
Factors Amazon Considers
Number of boxes
Shipment weight
Shipment dimensions
Pallet requirements
Marketplace and region
Fulfillment center requirements
Why Some Options May Not Appear
Certain shipping methods may not be available if:
The shipment is too large or too small.
Pallet information is required.
Carrier eligibility requirements are not met.
Amazon restrictions apply.
Summary
The shipping methods displayed during shipment creation are determined automatically based on the shipment characteristics and Amazon's fulfillment requirements.