It's "jeans are". Some nouns, like "jeans are", only have a plural form and require a plural form of a verb.
It's "jeans are". Some nouns, like "jeans", only have a plural form and require a plural form of a verb.
My jeans are in the closet.
My jeans is in the closet.
Follow the same convention with other verbs; for example, we say "your jeans look..." (not "your jeans looks...") or "your jeans have..." (not "your jeans has...").
Your jeans look worn.
Your jeans looks worn.
Being "jeans" a plural noun, we use a plural pronoun or determiner (they, them, these, those, etc.) with this word.
Learn how to cut your own jeans if they are too long.
Those jeans look naturally ripped.
And remember, don't use the article "a" with plural nouns because "a" is for one. However, you can use the expression "a pair of jeans". In this case, use a singular form of a verb because the word "pair" refers to a single entity.
There is a pair of jeans on the bed.
There are a pair of jeans on the bed.
A partial list of pieces of clothing that only have a plural form, and therefore take "are", can be found below: