Step 1: Measure wrist size and subtract by 1 inch. Cut flat leather to that measurement.
Step 2: Using serrated chain nose pliers or nylon pliers, crimp/flatten each end with a clamp. Make sure to crimp on both sides of the clamp.
Step 3: Open each jump ring from sliding clasp and set aside. Cut off 1.5″ of chain from both ends. Take jump ring and attach sliding clasp chain to loop of your clamp.