Start bare and dry
Measure clean nails with no polish, oil or hand cream — a slippery surface throws the reading off. Don't measure over acrylic or gel either; it reads wider than your natural nail.
Find the widest point
The widest part sits around the middle of the nail, sidewall to sidewall — not at the tip.
Measure across in millimetres
Lay a soft tape or a thin strip of paper across that widest point, following the natural curve without flattening it, and read the width in millimetres. For paper, mark both sidewalls and measure the gap against a ruler.
Do all ten
Measure every finger on both hands — left and right rarely match exactly, and thumbs are usually widest.
Size chart
Nail bed widths in millimetres
| Size | Thumb | Index | Middle | Ring | Pinky |
|---|---|---|---|---|---|
| XS | 14 | 10 | 11 | 10 | 8 |
| S | 15 | 11 | 12 | 11 | 9 |
| M | 16 | 12 | 13 | 12 | 10 |
| L | 17 | 13 | 14 | 13 | 11 |
- Choose the size that fits most of your nails.
- Between two sizes, or flatter nail beds? Size up.
- Outside this range, or spread across several sizes? Choose Custom and send us your measurements.
Pick the size that fits most of your nails
Compare your ten numbers to the chart above and choose the size that matches the most of them. Between two sizes, or flatter nail beds? Size up — a slightly larger nail files down to fit, while a too-small one looks unnatural and lifts early.
Outside the chart? Choose Custom
If your measurements fall outside the range, or spread across several sizes, choose Custom on the product page and enter your ten widths there. Custom sets are made to your exact measurements for a small additional fee.
Find my size
Enter your ten widths in millimetres and we'll tell you which size to take.
Avoid
- Don't measure at the tip or the cuticle — you'll read too narrow or too wide.
- Don't measure straight after oil, lotion or a hot shower.
- Don't guess all ten from one finger.
- Don't measure over acrylic or gel.
A note on fit
Sets are made on demand, so opened sets can't be exchanged for hygiene reasons. If the size you chose doesn't fit, get in touch — we'd rather remake it than leave you with a set you can't wear.