Before you decide how to send a package you should ensure your parcels are packed well enough to be transported safely across long distances, potentially being passed through a range of vehicles and warehouses depending on where you are shipping to.
Use a sturdy, heavy-duty cardboard box to prevent any damage to the goods inside.
If the items inside are fragile, make sure they are wrapped separately. Fill any spaces in the box with polystyrene chips.
Seal any openings of the box with layers of tape to ensure the box does not open.