Determine desired size of earrings and mark the back of the leather to indicate cuts. (Pictured pair is 55x20mm.)
Cut leather to size with rotary cutter, against a straight edge ruler. I recommend cutting into a long strip, and then cutting to desired length. Do not use rotary cutter on desk or table top without a protective layer.
Punch hole at one end to attach earwire. (To ensure that the earrings hang straight, you may want to measure and find the center before punching.)