These units are mostly historical, although they are still used in some limited contexts and in Maltese idioms and set phrases.
All these measures were defined as simple multiples of the Imperial units then in use in Britain.
Length units were typically used for measuring goods and building sizes.
Distances were traditionally measured in terms of travel time, which explains the lack of large-scale units.
All the Maltese mass units were redefined relative to the British Imperial ton in 1921.