Well, there are more than a pair of answers.
A Trousers' or 'a Pair of Trousers'. Which Is Correct?
When I say ( I need pants ) Which do I mean ( I need a pair of pants ), (
HOW TO STYLE A PAIR OF PANTS IN DIFFERENT WAYS - 50 IS NOT OLD - A Fashion And Beauty Blog For Women Over 50
Why do we say pair of pants when it's just one?
Is it ok to say 'jeans' as 'Jean'? - Quora
What is the purpose of this in a pair of Jeans? : r/HelpMeFindThis
Why Is It Called A Pair Of Underwear? – WAMA Underwear
If trousers are referred to as a pair of pants, does that make one leg of trousers a pant? - Quora
Why Is It Called A Pair Of Underwear? – WAMA Underwear
Which is correct 'pants pocket' or 'pant pocket'? - Quora
How to tailor a pair of jeans
Why do we call it a pair of pants? #history #language #linguistics #
Why is it called a pair of jeans? - Quora
Pants as a gesture of reform and rebellion for women - Blog of Leonardo da Vinci ;)