Product — WHATNAIL

Handmade in small editions · Reusable by design

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WHATNAIL fit service

How to measure.

Measure every natural nail at its widest point before choosing a standard size. Use millimetres and always size up when a measurement falls between two sizes.

Three close-up steps showing a bare nail, measuring tape across the widest point and recording the measurement

Start bare

Remove polish and product so the natural nail plate is clean and visible.

Wrap the curve

Place soft measuring tape snugly across the widest part, from sidewall to sidewall.

Record in mm

Write down each finger separately, then compare your measurements with the chart.

Size	Thumb	Index	Middle	Ring	Pinky
XS	14 mm	10 mm	11 mm	10 mm	8 mm
S	15 mm	11 mm	12 mm	11 mm	9 mm
M	16 mm	12 mm	13 mm	12 mm	10 mm
L	17 mm	13 mm	14 mm	13 mm	11 mm

XSVery petite hands and narrow nail beds.

SFits most customers and is a good first choice.

MFuller hands or wider, flatter nail beds.

LExtra-wide nail beds; measure carefully before ordering.

Between sizes? Choose the larger size—you can gently file the edges for a snug fit. Handmade sizing may vary by 1–2 mm.