about "how long"

[edmondjanet]

Hello everyone,
In my knowledge "how long " is duration. But recently I saw one sentence which is,
How long is your scale? Is it correct or what is the length of scale?
Thank you.

[Raymott]

Hello everyone,
In my knowledge "how long " is duration. But recently I saw one sentence which is,
How long is your scale? Is it correct Yes.

or what is the length of scale? That depends what the scale is.

Thank you.

"How long" is used just as much for distance or length as it is for time. (long => length)
"How long is your scale," said one snake to the other.