Find Your Press-On Nail Size Online — Measure Your Fingers in 30 Seconds

tl;dr: free online nail measurement tool — calibrate with a credit card, measure nail size online in 30 seconds, get your size instantly. no ruler, no guessing. period.

Method 1 — Measure On-Screen (fastest, no tools needed)

This free nail measurement tool works directly on your screen. Calibrate with a credit card, drag to measure each nail, get your size instantly. Works on any phone or tablet — no app, no ruler, no printing.

Method 2 — Measure the Old-School Way, more precise.

Two methods, both under 2 minutes. When measuring nails for press ons, always measure the widest point of each nail — not the tip, not the base. Between sizes? Go up.

How to measure nail width for press-on nails — soft tape measure method and paper strip method | MOONLEE size chart

Soft Tape Measure (most accurate)
Use the millimeter side. Wrap around the widest part of your nail bed — not the tip. The width of your fingernail at its widest point is the number you need. Read the mm where the tape meets itself. Do all 10 fingers.

Paper Strip (no nail ruler needed)
Cut a thin strip of paper. Wrap it around your nail at the widest point and mark where the edges meet. Lay it flat on any ruler and read the mm. Done. This is the simplest nail measuring tool alternative if you don't have a tape measure.

Pro tip: measure both hands. Your dominant hand is often 0.5–1mm wider. Most MOONLEE sets include multiple pieces per size so you can mix.

The MOONLEE Size Chart

Match your mm reading to the chart below. One size per finger — they're rarely all the same. Use this as your nail calculator: measure → match → done.

Size	Thumb	Index	Middle	Ring	Pinky	Best For
XS	14mm	10mm	11mm	10mm	8mm	Petite / Small hands
S	15mm	11mm	12mm	11mm	9mm	Most common fit
M	16mm	12mm	13mm	12mm	9mm	Average hands ✓ Best seller
L	17mm	13mm	14mm	13mm	10mm	Wider / Larger hands

Unit: mm. 1–2mm variance is normal. Between sizes? Always go up.

Between Two Sizes?

Size up. A press-on 0.5mm too wide can be filed slightly at the edges. Too narrow and it lifts from the sides within days — wrong size, wrong result, every time.

Flat or Wide Nail Beds

Size up one and use gel tabs instead of glue — tabs conform better to flat surfaces and are gentler on the nail. Glue vs. Tabs: full breakdown →

The Complete Sizing Reference

Measurement methods, size chart, golden rules — all in one place.

MOONLEE precision sizing guide — complete press-on nail size chart with XS/S/M/L mm measurements, digital on-screen tool, soft tape measure and paper strip methods, golden rules of sizing, and expert fit tips

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Q: How do I measure my nail for press on nails?
A: Use Method 1 above — it's a free nail measurement tool online. Credit card on screen to calibrate, hold each finger up, get your width in mm. Or use Method 2 with a soft tape measure. Always measure the widest point of each nail bed.

Q: How do I measure my nail size without a ruler?
A: The on-screen tool is your nail ruler replacement. No ruler, no printing, no app. Just your phone and a credit card. Accurate to ±0.5mm.

Q: Can I measure nail size online for free?
A: Yes — that's exactly what this page is. Free nail measurement tool online, works on phone and desktop, no downloads required.

Q: Do I need to calibrate every time?
A: No — your calibration is saved on your device. Only redo it if you switch screens.

Q: Are MOONLEE sizes the same as other brands?
A: Not always. Sizing varies by brand and nail shape. Always use our chart rather than assuming from another brand.

Q: Can I size down for a more tapered look?
A: We don't recommend it. Gaps at the sides collect moisture and cause lifting. File the shape instead of sizing down.

Q: What if my thumb is wider than size L?
A: Contact us — we can advise on custom sizing options.

Q: Do I need the same size for both hands?
A: Measure both. Your dominant hand is sometimes slightly wider. Most sets include multiple pieces per size so you can mix.

Go grab your fit. → Shop all MOONLEE sets

Not sure which shape suits your hand? → Nail Shape Guide by Hand Type

Want to make them last 2 weeks? → The 7-Step Prep Ritual

✨ Know your size? These 3 bestsellers are ready for you: