Press-On Nail Size Calculator
Record all ten nail widths instead of assuming both hands match. Use the result as a starting point, then compare with the exact brand chart.
Enter the widest nail-plate width in millimeters. Brand size numbers such as 0–9 and preset labels such as S/M/L are not standardized. This tool keeps your actual measurements instead of inventing a universal conversion.
Left hand
Right hand
Compare valid millimeter values with the seller’s own chart. If you land between listed widths, check that brand or product line’s current sizing instruction before choosing a candidate; manufacturers do not publish one universal size-up or size-down rule.
How to measure
Measure the widest visible part of each nail plate from sidewall to sidewall. A small caliper is ideal for straight width. If you use tape that follows the curve, make sure the brand chart expects that method.
Press-on size numbers vary between brands. Millimeters are the portable part of your profile.