Refers to the physical length of an object, or the duration of time. Common in everyday conversation.
この川の長さはどのくらいですか。
How long is this river?
会議の長さに驚いた。
I was surprised by the length of the meeting.
Please measure the length of this stick.
This rope is five meters long.
Please adjust the length of the belt.
I cut the fabric to match the length of the curtain.
length indicator octets