All matter, including "the kilogram of the archives", has two
properties, they are volume - three dimensional extent - and weight. We
need to know the volumes of materials so that we can determine if we
have room to carry and to store them. We need to know the weights of
materials to determine if we have strength enough to carry them and
strong enough facilities to store them.
The two main methods of measuring matter, are by volume and by weight.
Cups, pints, quarts, gallons, and other containers are for measuring
the volume of liquids and other loose materials; cubic inches, cubic
feet, cubic yards and cubic miles are for measuring the volume of
materials that can't be easily measured with containers.
Weight scales are for measuring weight: These scales come in many
sizes, and different types: The two best known types are probably the
spring scale, and the (platform) balance scale.