These jeans of my husband's were too big in the waist, too long, and had a small bit of fraying on the front thigh.
Before: too long, front
Before: too long, back
Before: too big in the waist (note safety pins)
Before: closeup of fraying at right thigh
After: I hemmed the jeans so that they fell just above his regular shoes.
After: hemmed jeans, back view
After: closeup of the hem
After: closeup of the mending I did to prevent further fraying at the thigh
After: I narrowed the waist by sewing in two darts from the back waist to the back pockets.