Measurement (11)
There are a few possibilities for this:
mensuration
'measurement' is the definition.
(synonyms)
This is all the clue.
'measurement' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for inch that I've seen before include "Creep towards < island" , "One point 63380 th of a mile" , "2.54 centimetres" , "Part of a foot" , "One twelfth of a foot" .)
'measurement' is the definition.
(size is a kind of measurement)
This is the entire clue.
(Other definitions for size that I've seen before include "credit at university" , "Degree of largeness" , "Magnitude; glue" , "Extent; a sealant" , "gelatinous mixture" .)