is a type of (narrower)
the magnitude of something in a particular direction (especially length or width or height)
is an attribute of
not thin; of a specific thickness or of relatively great extent from one surface to the opposite usually in the smallest of the three solid dimensions
"an inch thick"; "a thick board"; "a thick sandwich"; "spread a thick layer of butter"; "thick coating of dust"; "thick warm blankets"
is an attribute of
of relatively small extent from one surface to the opposite or in cross section
"thin wire"; "a thin chiffon blouse"; "a thin book"; "a thin layer of paint"