The word “scissors”. Is always in plural?

Hello, Charles.

The noun “scissors” is mostly used in plural form.

Great question

In Spanish, the correct word for "scissors" is in plural too, and yes, say "scissors" in English is correct too.

It is considered nonstandard to use 'a pant' or 'a scissor' as singular nouns, because this words are plural-only nouns. I leave you here more information about it.