Airfreight
Custom-built airfreight crates are used for items of furniture, electronic devices, or other delicate objects such as breakables.
Less delicate objects such as books, clothing, etc. in removal boxes will be placed on pallets and are then shrink-wrapped.
In this way, the risk of damage by dropping or loss by sending separate boxes is considerably diminished.
Small numbers of individual items such as cardboard boxes, metal boxes, plastic bins, etc. can be shipped individually, without additional crating.
The cost of shipping by airfreight depends essentially on the weight.
Nevertheless, there is a so-called chargeable weight which is a minimum price per volume.