How to Find Your Perfect Press-On Nail Size (XS–L Chart)

The single biggest reason press-ons fail is wrong sizing. A set sized perfectly lasts twice as long, looks natural, and feels comfortable. Here's exactly how to measure your nails and pick the right size from any XS–L set — including our own.

Why Size Matters So Much

A press-on that's too small sits above your natural nail and looks fake. One that's too big touches the skin at the sides, lifts within hours, and can even cause pressure. Getting it right means edge-to-edge coverage: the press-on covers your entire nail bed but never overlaps your skin.

What You'll Need

• A ruler or measuring tape (millimeters)
• Your natural nails — bare and dry
• 2 minutes

Step-by-Step: How to Measure Your Nails

1. Measure the widest point. Place the ruler flat across your nail at its widest spot (usually near the middle of the nail bed, not the tip).
2. Write down the width in millimeters for each finger. Most people need 2 different sizes, but it's normal to need 3.
3. Match to the chart below. If your nail is between two sizes, size down and file the sides lightly — a snug fit is always better than a tight one.
4. Check your pinky and thumb — they're almost always a size apart from your middle fingers.

XS–L Size Chart (Approximate Nail Bed Width)

Size	Nail Bed Width (mm)	Best For
XS	8–9 mm	Petite hands, pinky & ring fingers
S	10–11 mm	Slender fingers
M	12–13 mm	Average hands
L	14–15 mm	Broad hands or thumbs

Sizes vary slightly between brands — always measure fresh, and check the size note on the specific product page.

When You're Between Two Sizes

• Size down. A slightly small press-on lasts far longer than a slightly big one.
• File the sides. Our sets include a mini file — a few gentle passes on the side edges give a custom fit.
• Don't force it. If it touches skin on both sides, it's the wrong size — try the next one up.

Every Ubeauty Set: 24 Pieces in 12 Sizes

Here's the best part — our press-on sets include 24 nails in 12 sizes, with two of every size. That means you get two full trials: match every finger from the first tray, and if one size is off, the spare nails in that size are right there. No measuring anxiety, no wasted sets.

Need the tools to apply them perfectly? Grab our Nail Application Kit (glue + jelly tabs + tools) and follow the application guide for 2-week wear.

The Bottom Line

Measure the widest part of each nail, match to the chart, size down when in doubt, and file for a custom fit. With 12 sizes per set, you're covered. Browse Ubeauty press-on nails — free US shipping $35+.