How to measure

Method 1

1. Wrap your fingernail with a flexible measuring tape
2. Measure the width of the fingernail at its widest point
3. Measure the widest part of the nail surface

Method 2

1. Place a strip of paper at the widest point of nail, ensuring it adheres closely to the nail surface
2. Mark the edges of the nail surface on both sides
3. Measure the distance between the marked points using a ruler/ruler app on your phone