1. Use a ruler to measure the distance from the hole to the edge of your ear.
2. Add 1 mm for a snug fit and 2 mm for a loose fit.
1. Insert a stud earring to your piercing hole that you can comfortable wear.
2. Record the excess length, subtract it from the total length of the earring, and that's the length you need.3. Add 1 mm for a snug fit and 2 mm for a loose fit.