Like skirt lengths, pant lengths can, too, fall victim to trends. Remember, trends come and go but style is forever. The photo above shows the classic length for both a trouser hem and a skirt hem. The skirt should fall about 1/2 inch over the top of the knee.
Pants should be kept long enough at the back to touch the top of the heel of the shoe with ease yet short enough in the front to form a break in the line of the pant.
The crease line will be broken 6 inches above the shoe or boot. In other words, the pants will look a little too long in the front while the crease line in the back remains unbroken.