(1) Some objects are long, some are short.
(2) Some objects are tall, some are short.
(3) We compare the lengths of objects to find out which is longer or shorter.
(4) We compare the heights of objects to find out which is taller or shorter.
(5) We use non-standard tools like a piece of long string, hair pins, straws, pencils, erasers or paper clips to measure the lengths or heights of objects.