Leather trousers are a sure fire way to make a style statement. The trousers should fit well for maximum impact. This may mean hemming them. Trousers that are too long should be hemmed in order to prevent soiling or tearing. Hemming a pair of men's leather trousers is much the same as hemming a pair of trousers made out of cloth; only you must use a sturdier thread.
Remove the seams from the hem of the trousers using your seam ripper.
Put on the trousers and shoes that you will typically wear with the leather trousers.
Stand straight. Fold the hem to the desired length. Typically, the hem should be about 1/2 inch below the ankle bone. Mark this line the entire way around the bottom of the pant leg with the fabric pen. Standing in front of a mirror or having a friend help you can make this easier.
Take off the trousers. Fold them at the marked pen line.
Insert straight pins along the bottom and top of the hem at 1-inch intervals around the area to be hemmed. Place the pins in a straight line or the hem will be crooked.
Try on the trousers again to ensure the hem is at the proper length. Adjust if necessary. Take off the trousers and turn them inside out.
Fold up the trousers to the fabric mark. Apply a thin line of leather glue to the creased area. Wait for a few moments for the glue to become tacky. Fold the hem up and press with the back of a spoon to hold it in place.
Choose a heavyweight thread that matches the colour of the leather trousers. Rayon is a smart choice when sewing leather. Thread your needle with about 3 feet of thread.
Stitch the pant leg.
Tie off the thread when you have sewn the entire pant leg. Snip off the thread using the scissors.