Measure each natural nail at its widest point, following the measuring method specified by the brand. Then match each measurement to that brand's own size chart. Nail tips and sizing systems vary, so a number from one brand may not match the same number from another.
What you need
- The sizing guide or measuring instructions for the brand you plan to order from
- A flexible measuring tape or a narrow strip of paper or clear tape
- A millimeter ruler, if the brand's chart uses millimeters
- A note or table to record each finger separately
If the brand offers a sizing kit or printed template, check its instructions first. The tool and method should match the chart you will use.
How to measure each nail
- Measure your natural nail. Remove any press-on tips first. If you have extensions or product covering the nail, do not guess at the natural nail's width; ask the brand which sizing method to use.
- Find the widest point. This is usually across the nail plate near the middle, but nail shapes differ. Measure from one side edge to the other.
- Follow the nail's curve when required. If the brand's chart calls for curved width, lay a flexible tape or paper strip over the nail surface, following its curve without pulling it tight. Mark where the nail edges meet the strip, then measure the distance between the marks as the brand instructs.
- Use a straight-width method only when the chart specifies it. A ruler laid straight across the top measures a straight-line width, which may not correspond to a chart based on the curved nail surface.
- Record all ten nails. Measure both hands, including both thumbs. Do not assume matching fingers are identical.
- Match each result to the chart. Check the units, measurement method, and size labels before selecting each tip.
Do not wrap a strip around your fingertip. The measurement is across the nail, not around the finger.
Record your measurements
Use this table to keep both hands separate. Add the sizes that match the brand's chart after measuring.
| Finger | Left nail width | Left size | Right nail width | Right size |
|---|---|---|---|---|
| Thumb | ||||
| Index | ||||
| Middle | ||||
| Ring | ||||
| Pinky |
Write the unit beside your measurements (for example, mm) and note whether you used the brand's curved or straight-width method.
How to choose between two sizes
There is no universal “always size up” rule. Compare your measurement with the brand's chart and check how the tip is meant to sit. A tip should not press painfully against the sidewalls or leave a fit that the brand describes as too wide. If you fall between sizes, use the brand's recommendation, ask about a sizing kit, or request help before ordering a custom mix.
Do not force a tip onto the nail. If a set feels painful, presses on the surrounding skin, or does not sit as described in the product instructions, stop and contact the maker for guidance.
Does adhesive change the size you need?
The tip still needs to fit your nail according to the maker's sizing guidance. Adhesive tabs and nail glue do not create a separate sizing system. Follow the instructions supplied for the specific tip and adhesive, and do not choose a deliberately loose or tight size based only on the adhesive type.
Common sizing mistakes
- Using another brand's chart: size labels and tip shapes are not standardized across makers.
- Measuring straight across when the chart uses curved width: use the method stated by that brand.
- Measuring only one hand: corresponding nails can differ.
- Measuring over a press-on tip: this does not give the natural nail measurement requested by many charts.
- Guessing when between sizes: use the brand's sizing support or kit rather than relying on a universal rule.
- Ignoring shape and length: width is only one part of fit; compare the set's shape and length options with the product information.
Frequently asked questions
Do I need to measure every finger?
Yes. Measure all ten nails and record each hand separately. This helps you choose sizes based on your own nails rather than assuming both hands match.
Should I measure the curve or the straight width?
Use the method specified by the brand's chart. Some makers ask for curved width, while others provide a different template or instruction. Do not compare measurements taken by different methods as if they were equivalent.
What if a measurement falls between sizes?
Check the brand's instructions and the shape of the available tips. If the chart does not explain what to do, ask the maker or use its sizing kit before ordering. Avoid forcing a tip that presses against the nail or surrounding skin.
Are press-on nail size charts the same across brands?
No. Tip shapes, size labels, and measuring methods can differ. Use the chart for the exact brand and set you are ordering.
Do I measure with nail polish on?
Follow the brand's instructions. For a clear measurement, measure the nail plate rather than an existing press-on tip or thick overlay. If polish, gel, or extensions make the nail edges difficult to identify, ask the maker how it wants you to size.
Can I use a ruler if I do not have a tape measure?
Only if the brand's method calls for a straight-width measurement. If it asks for curved width, use its sizing kit or the paper-strip method it recommends; a flat ruler across the nail may give a different result.
Can I order a custom mix of sizes?
Availability varies by brand and set. Check the product listing or ask whether a custom mix is offered and how to submit your per-finger measurements.
Before You Order
Use the size chart and measuring instructions for the specific set you plan to buy. If you are unsure about a borderline measurement, contact the maker before ordering.
- Explore the Atelier — ask about custom sets and sizing.
- Wholesale & Custom Collections — ask about sizing kits or sample options for retail projects.
Measurements are only useful when taken with the method that matches the selected brand's chart. Fit also depends on tip shape and the individual nail. Follow the product instructions and ask the maker if you are unsure.