Well-fitted jeans are a basic that every good looking guy should have in their closet.
Every man needs to have at least two pairs of this, a black and washed blue one. The jeans should fit you well, but not super tight because it will be uncomfortable for you and also it would look bad. Every gentleman wheres their paint on their waist, not below it. One of the most important things, that guys often do wrong, is the fit around the ankle. The jeans should not sack or stay very loose. They have to be the right size so they can show off your shoes. If you have paints that are too long you can always cuff them by using something like the pin roll. Here is a tutorial on how to do that.