Hebrew קָנֶה. Literally "a stalk". Also called Qaneh, Measuring rod.
A surveyor's rod of six cubits — the unit Ezekiel's temple is measured with.
Length
3.11–3.15 m (10.2–10.3 ft).
Defined as 6 cubits (royal).
Inherits the disagreement over the cubit.
A reed is a measuring rod six cubits long, and it is the tool as much as the unit: the man in Ezekiel's vision carries one. Because Ezekiel is using the long cubit, his reed is a little over three metres. Revelation picks the image up again for measuring the new city.
Ezekiel measures with the long cubit, an ordinary cubit and a hand width more, so his reed is a hand width per cubit longer than six ordinary cubits. The man is a 6-ft figure for scale; the measuring man of the vision has no size given. He also carries a line of flax (40:3), shown coiled in his hand.