Nail Size Guide
Finding the right size genuinely makes all the difference — a well-fitting set will last longer, feel more comfortable, and is less likely to pop off. The right fit not only extends the life of your nails but also perfects your look.
Follow the steps below to measure your nail widths with a measuring tape, then compare your results to our pre-made size sets (also listed on each product page).
If you’d rather skip measuring, you can always choose a custom set — details at the bottom.
How to measure your nails at home
(step-by-step)
What you’ll need:
A flexible measuring tape or a small ruler with millimeter markings and a pen + paper or your phone to record measurements.
Find the widest point:
Measure straight across the nail at its widest point (left-to-right), across the nail plate — do not include skin or the cuticle. This is usually near the center of the nail.
Measure carefully:
Hold the tape/ruler gently against the nail, read the measurement in millimeters (mm), and record it. Aim for the nearest 0.5 mm if possible.
Label each measurement:
Note which finger the measurement is for. Measure each nail you’d like a press-on for — both hands if you want the most accurate fit.
LEFT HAND FORMAT:
Thumb _ , Index _ , Middle _ , Ring _ , Pinky _
RIGHT HAND FORMAT:
Thumb _ , Index _ , Middle _ , Ring _ , Pinky _
If you land between sizes:
Pick the larger size and gently file the sidewalls of the press-on for a perfect edge-to-edge fit — or choose a custom set and we’ll size it exactly for you.
Once you have your nail width measurements, refer to our pre-made sizes below.
(If most of your nails match one of our sets, that set will usually work well.
If your nails vary a lot in width, consider custom sizing.)
Available Pre-Made Sizes
Each pre-made set includes five nail widths (a match for each finger) — listed
below with both standard size numbers and the millimeter width of each nail.
Nail size (Thumb to Pinky):
3, 6, 5, 7, 10
Width (Thumb to Pinky):
11.6 mm, 9.7 mm, 10.4 mm, 9.2 mm, 7.2 mm
Nail size (Thumb to Pinky):
2, 5, 4, 6, 9
Width (Thumb to Pinky):
12.2 mm, 10.4 mm, 11.1 mm, 9.7 mm, 7.2 mm
Nail size (Thumb to Pinky):
1, 5, 4, 6, 8
Width (Thumb to Pinky):
13.1 mm, 10.4 mm, 11.1 mm, 9.7 mm, 8.9 mm
Nail size (Thumb to Pinky):
0, 4, 3, 5, 7
Width (Thumb to Pinky):
13.8 mm, 11.1 mm, 11.6 mm, 10.4 mm, 9.2 mm