How to measure your nails ?

1. Apply a piece of tape

Place a small piece of tape across the widest part of your nail.
(Your nails should be bare.
Do not measure over gel, polish, or press-ons.)

2. Mark the widest points

Using a pen, mark both side edges of your nail on the tape.

3. Measure the width

Remove the tape, place it on a flat surface, and measure the distance between the marks with a ruler.

4. Record your sizes

Write down the width of each nail in millimeters (mm) for both hands separately, as nail sizes can vary from one hand to the other.

Example:
Left Thumb: 14 mm
Right Thumb: 13 mm