Packet and parcel are carrier classifications with different limits. Classify the finished package from official measurements, not from what a marketplace or packaging supplier calls it.
A packet generally covers smaller, lighter goods that no longer qualify as a letter or large envelope. A parcel covers larger packaged goods and may have different tracking, handling and weight options.
Format is based on packed measurements
Product names such as mailing bag are not postal classes
The destination can change available services
Measure without forcing the result
Record the longest point in each direction and weigh the item with all packaging. Do not squeeze a soft package while measuring or omit a protruding edge to fit a cheaper category.
Measure length, width and depth
Include labels and protective packaging
Use the next category if any limit fails
Compare the whole service
The cheaper format is not automatically the right shipping choice. Compare tracking, delivery aim, compensation, handover location and suitability for the contents alongside the price.
Check whether tracking continues overseas
Review prohibited items
Keep acceptance evidence for sales
Marketplace wording can mislead
A platform's small, medium or large parcel setting may map to a specific carrier product rather than An Post's public packet or parcel format. Follow the exact label and carrier rules attached to the order.
Use the prepaid label's carrier
Do not add unrelated postage
Correct listing dimensions before the buyer pays
How to get it right
Finish packing: Add all protection and seal the package.
Measure accurately: Record the three largest external dimensions and packed weight.
Check both formats: Compare the figures with the current packet and parcel limits.
Buy the eligible service: Select the destination, evidence level and handover route that match the package.
Official sources
Rules, availability and rates can change. Confirm the live details before buying postage.