Unit of length (4)

'unit of length' is the definition.
(I know that inch is a unit of length)
This is the entire clue.
(Other definitions for inch that I've seen before include "Move very slowly - a very short distance" , "One-twelfth of a foot" , "The island is very small in length" , "Edge towards" , "Small Scottish island" .)
'unit of length' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for foot that I've seen before include "Imperial distance" , "See 24" , "Base - unit of measurement" , "Measure - part of body" , "Infantry - unit of linear measure" .)
'unit of length' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for yard that I've seen before include "Imperial unit of length" , "Unit of measure" , "A little under a metre" , "quantity of ale" , "Thirty six inches" .)
'unit of length' is the definition.
(I know that mile is a unit of length)
This is the entire clue.
(Other definitions for mile that I've seen before include "5280 feet" , "Distance race" , "Unit of length" , "Imperial length" , "Eight furlongs" .)
'unit of length' is the definition.
(I know that metre is a unit of length)
This is the entire clue.
(Other definitions for metre that I've seen before include "Alignment of feet determines such" , "Characteristic of feet" , "100cm" , "determined by scanning" , "39.37 inches" .)
'unit of length' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for kilometre that I've seen before include "Unit of distance" , "Decimal distance" , "K stands for this" , "1000m" , "Unit of length" .)