The right size is what makes press-on nails look like your own. Too wide and they lift at the edges, too small and they feel tight. The good news: finding your size takes about two minutes and one ruler.
Your nails are not all the same width, so the trick is to measure them and order the size that fits best. Here is how to do it in about two minutes.
What you need
A ruler or a soft measuring tape with millimeters. That is it. Keep your nails clean and dry, with no polish that could add width.
Measure your nails in three steps
- Lay the ruler across your nail at its widest point, from one side wall to the other.
- Read the width in millimeters. Do this for all ten nails, both hands can differ.
- Note each number next to the finger it belongs to.
Find your size on the chart
Compare your measurements with the chart below. Each size lists the nail width for every finger, so find the size that lines up best with your numbers.

| 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 |
Between two sizes? Go smaller
If your measurements land between two sizes, choose the smaller one. A snug fit sits flat and holds longer, while nails that are a touch too wide tend to lift at the edges.
Once your set arrives, our step by step application guide walks you through a manicure that lasts 2 to 3 weeks.
Frequently asked questions
Do I measure the width or the length of my nail?
The width. Measure straight across the nail at its widest point. Length does not affect the fit, HELVA nails come pre-shaped.
What if the fit still feels off?
A nail that pinches means the size is slightly too big, so go down one. Edges that lift usually mean it was a touch too wide. Still unsure? Write to us and we will help you find your fit.
Ready to find your set?
Now that you know your size, all that is left is choosing your favorite design. Reusable, hand-decorated, with free delivery across Switzerland.
