What is the thickness of 65 lb cover stock?
So, if 500 sheets of uncut cardstock weigh 65 lbs, it’s called 65 lb stock. Point is calculated by the thousandths of an inch thickness of sheets of paper. A sheet of paper 0.010 inches thick is 10 pt cardstock, 0.015 inches thick is 15 pt cardstock, etc.
65 lb Cover Weight/176 gsm card stock is used in cases where you would need a lighter weight card stock. It is heavy enough to be used for post cards.