Nails by Mona

Sizing Guide

Getting your size right — about 90 seconds.

No tape measures, no guessing. Just your phone camera, any coin, and two close-up photos — one of your fingers, one of your thumb.

What you'll need

Before you start.

Your smartphone

The back camera gives better image quality than the front. Any phone from the last five years works fine.

Any coin

A Rs. 5 or Rs. 10 coin is ideal, but any coin of known size works — just tell me which one when you submit. The coin sits above your nails in each photo and gives me a known size to measure your nail widths against.

Natural light

A window in daylight is ideal. Avoid harsh overhead lighting or direct flash — it creates shadows that obscure nail edges.

That's genuinely it. No printer. No ruler. No measuring tape. No trip to a salon.

The photos

Two close-ups, one minute.

I size your nails by reading their width directly off the coin in each photo. To do that I need to see the nails up close — not your whole hand from the wrist out. So: two close-up photos, one for your fingers, one for your thumb.

Hand laid flat on a dark cloth, ready for sizing photos
01

Get ready

Find a dark cloth — a sweater sleeve, a cushion cover, or a dark towel works perfectly. Plain dark surfaces make your nail edges stand out clearly. Have your phone and any coin in reach. Find a window with daylight if you can.

Tip

Avoid busy patterned backgrounds (carpet, printed fabric). The live-camera guide reads them as clutter and the alignment border stays red.

02

Photo 1 — Your fingers

Lay your hand flat on the cloth. Tuck your thumb behind so just the four fingers show in a flat row. Place a coin above your middle fingernail — close enough that I can see both the coin and all four nails clearly in one frame. Hold your phone straight overhead and snap.

Tip

The coin should sit just above your nail bed, not on top of your fingertip. Touching is fine — covering the nail isn’t.

Four fingers laid flat with coin above middle finger — sizing overlay guide
Thumb extended flat with coin above thumbnail — sizing overlay guide
03

Photo 2 — Your thumb

Now lay your thumb flat on the cloth, extended out. Place the coin above your thumbnail — same idea, same close distance. Snap.

Tip

Thumbs are usually the trickiest fit because they curve more than fingers. A clear photo here saves you a refit later.

04

Optional — your other hand

For most customers, two photos are enough. Most hands are symmetric within half a millimetre, well within the press-on fit tolerance — so I size both hands from the photos you’ve already given me.

Want a perfect fit? Take the same two photos for your other hand at the end of the live-camera flow (it adds about 60 seconds). Either way, the first refit is on me, no questions, if anything doesn’t sit right when you receive the set.

Quick check before you submit:

  • Coin visible and not covering any nail
  • All four nails inside the overlay (in the fingers photo)
  • Even lighting — no harsh shadows across the nail row
  • Both photos in focus — not blurry
Pair of good sizing photos — fingers and thumb both well-framed with coin

Quick Reference

What I can and can't work with.

Good overhead shot Good

Fingers photo — four nails flat in a row, coin above middle nail, dark cloth backdrop

Good window light Good

Thumb photo — thumb extended flat, coin above thumbnail, in focus

In focus, full hand Good

Both photos sharp — nail edges and coin clearly visible

Avoid

Too far away — fingers and coin small in frame, nail edges blurry, hard to measure

Avoid

Coin missing or covering a nail — can’t calculate scale, nail width hidden

Avoid

Busy patterned backdrop — the live-camera alignment border stays red; switch to plain dark cloth

Even easier

Use our in-app camera guide.

When you place an order, there’s a live camera screen built right into the process. It walks you through both photos in a single session — fingers first, then thumb — with an on-screen guide and a green/red border that shows you when each frame is well-framed. The guide does the framing for you.

Works on most Android and iPhone cameras from the last few years. If your camera isn’t supported, the upload option works exactly the same — just two file inputs.

Try the camera guide

PHOTO 1 OF 2 — FINGERS

Good lighting
COIN ABOVE NAILS

Already ordered before? Your sizing is on file.

If you’ve ordered from me before and provided sizing photos, I keep your measurements saved. When you reorder, just mention your name and previous order number — no re-measuring needed. Reorders also get a 10% discount.

WhatsApp to reorder →

Not sure if your photos are right?

If you’re unsure whether either photo will work — maybe the lighting was off or you couldn’t get the coin in the right spot — just send them to me on WhatsApp before placing your order. I’ll tell you immediately whether they’re usable or if we need a retake.

Send photo for review →