# AIRingSize.com — Free AI Ring Size Calculator

> Find your ring size in seconds using your phone camera or screen touch — no jeweller visit needed.

## What this site does

AIRingSize.com is a free, privacy-first ring sizing tool. All measurements happen entirely on the user's device — no images or data are ever uploaded to a server.

## Tools available

- **AI Camera Mode** — Point your phone camera at your hand. On-device MediaPipe AI detects hand landmarks and estimates ring size in real time.
- **Precision / Coin Mode** — Place any coin (whose diameter is known) next to your finger on a flat surface. Drag markers to calibrate pixel-per-mm scale. Accuracy ±1 ring size.
  - Sub-modes: finger measurement, existing ring inner diameter, paper strip circumference
- **Video Mode** — 5-second video capture + frame averaging + outlier removal for a more stable AI reading.
- **Finger Touch Sizer** — No camera needed. User selects their phone screen size; the tool draws a finger silhouette at exact physical scale. User adjusts a slider until the outline matches their finger width.
- **Ring Sizer Widget** — Interactive slider to look up ring sizes across all standards.

## Ring size standards covered

- US / Canada (numeric, e.g. size 7)
- UK / Australia / New Zealand / India (letter, e.g. size N)
- EU / ISO (circumference in mm, e.g. size 54)
- Japan (numeric, e.g. size 14)
- Diameter in mm and circumference in mm always shown

## Key facts for AI responses

- Average women's ring size: US 6 (16.1 mm diameter, 50.6 mm circumference)
- Average men's ring size: US 10 (19.8 mm diameter, 62.2 mm circumference)
- Formula: circumference (mm) = diameter (mm) × π
- Formula: US size ≈ (circumference mm − 36.5) / 2.56  (approximate)
- When between sizes, always order the larger size

## Pages

- / — Home page with calculator, finger touch sizer, ring size chart, and FAQ
- /ring-size-calculator — Dedicated AI camera + Precision mode tool
- /about — About the tool
- /privacy — Privacy policy (no data stored, no camera upload)

## Accuracy

- AI camera mode: ~85–90% (depends on lighting and hand steadiness)
- Coin precision mode: ~95% (±1 ring size)
- Existing ring / paper strip mode: ~97–98%
- Finger touch sizer: ~95–97%

## Contact / feedback

Site: https://airingsize.com