With Doonails, it's particularly easy. You don't have to measure your nails in advance.

Each pack contains 15 different sizes, so you can find your perfect fit in the comfort of your own home. 99% of our customers find their perfect size straight away.

Here's how it works:

1. Simply hold the press-ons against your natural nails.
2. The press on should not protrude at the sides, but the natural nail should not be visible either.
3. Choose the size that completely covers your nail.

Tip: The right size forms a line with your natural nail at the edges. If necessary, you can file the edges of the press-ons to make them narrower so that they fit your nail plate perfectly.

You don't need to measure anything in advance with our UV gel strips either.

Each pack contains nine different sizes, so you can easily test the strips directly on your natural nails.

How to find the right size:

1. Hold the UV gel strips over your nails.
2. Select the appropriate size.

If you are unsure, it is better to choose the smaller size so that the UV gel strip does not stick to the cuticle – this prevents it from coming off and ensures that your manicure lasts longer.

If a strip is a little too wide, you can carefully trim it at the sides with nail scissors.

If you are between two sizes, we always recommend choosing the smaller size, as a nail that is too large will stick to the cuticle and come off more quickly.

You can also easily adjust press-ons or UV gel strips that are too large:

• Press Ons: Simply file the sides at the back to make them slightly narrower.
• UV gel strips: Carefully trim the sides at the back using nail scissors.

The right nail shape depends on your desired look and occasion. But of course, it also depends on the shape of your hands and your nail bed. As a general rule, however, always choose the shape you feel most comfortable with! We offer the following press-on nail shapes:

• Almond: looks elegant and makes your fingers look longer
• Round: natural and soft
• Square: modern and clean
• Coffin/Ballerina: trendy and glamorous

Almond and oval nail shapes make fingers appear longer because:

• the tip tapers narrowly
• no edges interrupting the length
• the eye is guided vertically

These shapes are particularly suitable for short fingers, wider nail beds, or smaller hands that want to appear longer.

Short Square and Short Round are considered particularly stable because:

• the tips are not too pointed or too narrow
• less pressure on a narrow tip
• they are less susceptible to breakage in everyday use

For sports, lots of typing, or an active everyday life, we recommend our extra short or short lengths.

Short Round Press Ons look the most natural because they follow the natural shape of the nail bed.

This shape is ideal for:

• a subtle look
• everyday business life
• Beginners
• Customers who want a “My Nails but better” effect

The right length depends on your lifestyle:

• Extra Short / Short → Everyday wear, office wear, sportswear
• Medium → elegant, but still suitable for everyday use
• Long → Statement & special occasions

If you're unsure, start with shorts—they're the most versatile option.

The right combination of size and shape ensures:

• maximum grip
• high wearing comfort
• natural look
• longer shelf life

A perfectly fitting press-on feels like a natural nail and lasts much longer.

The nail size describes the width of the press-on nail and must fit your natural nail exactly.

The nail shape describes the design of the tip (e.g., almond, round, square, or coffin) and influences the visual effect of your hands.

Both of these factors, together with the nail length (extra short, short, medium), determine the fit, durability, and style.