
Measuring your fingernail length can be important for choosing the right size and shape of false nails. To measure your nails, you should measure the width of your nails at their widest part. You can do this by sticking a piece of tape across the width of your nail and marking the tape at the widest point on both sides of your nail. Then, remove the tape and use a ruler to measure the distance between the two marks in millimetres. Repeat this process for all ten fingers, as nail sizes can vary from finger to finger.
| Characteristics | Values |
|---|---|
| What to measure | Width of nails at the widest part |
| Tools | Soft measuring tape, small piece of tape, pen, ruler |
| Measurement process | Stick a small piece of tape across the width of the nail. Using a pen, mark the tape at the widest point on both sides of the nail. Remove the tape and use a ruler to measure the distance between the two marks in mm. |
| Additional notes | Measure all ten fingers as sizes can vary from finger to finger. An average thumb measures anywhere from 16mm to 18mm. |
| Choosing the right nail length | Think about daily activities and what length is practical. Consider the type of fingernail adhesives being used as some take up more space than others. |
| Sizing kits | Most press-on nail brands offer sizing kits with a range of nail sizes, typically from 0 (largest) to 9 (smallest) or 1 to 10. |
| Sample packs | Some brands offer sample size packs with one of each size, allowing you to try them on and find your perfect fit. |
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What You'll Learn

Measure all ten fingers
It is important to measure all ten fingers as nail sizes can vary from finger to finger and even between hands. An average thumb, for instance, measures anywhere from 16mm to 18mm in width, but this can differ for each person.
To measure all ten fingers, you will need a soft measuring tape, or alternatively, some regular tape, a pen, and a ruler. First, take a small piece of tape and stick it across the width of your nail. Using a pen, mark the tape at the widest point on both sides of your nail. Repeat this process for all ten fingers. Once you have marked all ten nails, carefully remove the tape and lay it on a flat surface. Now, use your ruler to measure the distance between the two marks in millimetres for each nail. Make a note of the numbers and compare them to the preset sizes offered by the brand you are purchasing from.
If you are unsure about your measurements, you can always opt for the 'Custom' option and leave your exact nail measurements in the note section at checkout. Many brands also offer false nail sample sizing packs, which can help you find your perfect fit.
Remember to consider the type of adhesives you will be using, as some take up more space than others. If you are using adhesive tabs, you may need a larger size than if you were using nail glue.
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Use a soft measuring tape
Measuring your nail length is simple and can be done with a soft measuring tape. Here is a step-by-step guide:
- Take a soft measuring tape, preferably one that uses millimetres as its unit of measurement. If your measuring tape has inches, you can still use it, but you will need to convert the measurements to millimetres later on.
- Hold the measuring tape horizontally across the widest point of your nail. Ensure that the tape is straight and not crooked, and that it is placed at the very tip of your nail bed, where it is the widest.
- Read the measurement in millimetres. If your measuring tape has inches, take the reading in inches and convert it to millimetres. If you are between two lines, always round up to the next line to ensure an accurate fit.
- For flatter nail beds, add 1 millimetre or 1 centimetre to your measurement. If you have very flat nail beds, add 2 millimetres or 2 centimetres. This adjustment is important to ensure that your nail measurements are accurate and comfortable.
- Repeat this process for all ten fingers. It is common to have different measurements on each hand, so it is important to measure each finger individually.
- Write down all your measurements. You can also note whether your nails are particularly wide or narrow to help guide your choices when selecting nail shapes or styles.
By following these steps, you can accurately measure your nail length using a soft measuring tape. This will help you choose the correct nail size and ensure a comfortable fit.
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Mark the widest part of your nails
Marking the widest part of your nails is a crucial step in determining your nail size. Here is a detailed guide to help you through the process:
Firstly, prepare a small piece of tape, preferably Scotch tape, and a pen or marker. The tape should be slightly longer than the width of your nail to ensure it adheres securely. Now, place the tape across the width of your nail, ensuring it is positioned at the widest part. This step may require assistance from another person for accuracy.
Once the tape is in place, use the pen to carefully mark the sidewalls of your nail on the tape. Make sure the marks are directly aligned with the edges of your nail. If done correctly, the marks should represent the widest part of your nail.
After marking both sides, carefully remove the tape from your nail. Place it on a flat surface, such as a table or a piece of paper. Now, take out a ruler, preferably a millimetre ruler, and measure the distance between the two marks. Ensure you record the measurement in millimetres, as this is the standard unit for nail sizing.
Repeat this process for all your nails, as nail sizes can vary across different fingers. By marking the widest part of your nails and measuring the corresponding tape markings, you can accurately determine the width of your nails and, consequently, their size. This method ensures that you choose the correct nail size when ordering false nails or stick-on nails, providing a more comfortable and aesthetically pleasing fit.
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Compare to a size guide
When ordering false nails, you can choose the correct nail size for you. This means you don't have to worry about buying false nails that don't fit. Most press-on nail brands offer a size guide that corresponds to the width measurements of your nails. Typically, this will range from size 0 (being the largest) to size 9 (the smallest).
To measure your nails, you will need to measure the width of your nails at the widest part. If you do not have a soft measuring tape, you can stick a small piece of tape across the width of your nail. Using a pen, make a mark on the tape at the widest point on both sides of your nail. Remove the tape, and use a ruler to measure the distance between the two marks in millimetres. Make a note of the number, and repeat this process for each of your nails. It is common to have different measurements on each hand, so make sure to measure all ten fingers.
Once you have your measurements, you can compare them to the brand's size guide. Some brands offer standard pre-made size selections such as XS, S, M, and L, which correspond to a range of nail widths and sizes. You can review brand-specific charts to match these categories to your own nail measurements. If you prefer a more precise fit, you can also order a sizing kit, which usually includes a range of nail sizes from 0 to 9 or 1 to 10.
If you are unsure about your measurements or the brand's size guide, you can order a sample size pack, which includes one of each size, allowing you to try them on and find your perfect fit before ordering a full set.
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Order a sample pack
Ordering a sample pack is a great way to find your perfect nail fit. Most press-on nail brands offer a size guide that corresponds to the width measurements of your nails. Typically, sizes range from 0 (largest) to 9 (smallest).
If you're unsure about your nail size, a sample size pack can help you find your ideal fit. These packs include one of each size, allowing you to try them on and find the right match for each finger before committing to a full set. You can order a sample pack from your preferred brand, which will help you achieve a professional-looking manicure.
To measure your nail size, you'll need to measure the width of your nails at their widest part. If you don't have a soft measuring tape, you can use a small piece of regular tape and a pen. Place the tape across the width of your nail and use the pen to mark the tape at the widest point on both sides of your nail. Remove the tape and measure the distance between the two marks in millimetres. Repeat this process for all your nails, as sizes can vary from finger to finger.
Additionally, consider the type of fingernail adhesives you'll be using, as some adhesives may require a larger size. For instance, if you plan on using adhesive tabs, you may need a slightly bigger size than if you were using nail glue. When in doubt, it's usually better to round up and gently file the sides of the press-on nail for a perfect fit.
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Frequently asked questions
You can measure your fingernail length by finding the greatest longitudinal length between the tip of your finger and the groove at the junction of the proximal nail fold and eponychium.
The width of your fingernail is the greatest transverse distance between the two lowest points of the fingernail in the lateral nail groove.
You can use a standard ruler or a cap bearing measurement indicia that can be used in conjunction with a fingernail file or other elongated instrument.











































