Mobile ring measurement

Ring Sizer

Estimate ring diameter, finger width, and useful size measurements directly on your phone screen with a simple, focused measuring experience.

Explore features View workflow
Ring mode Finger mode Converter Size chart

Ring Size

⚙

Place your ring over the circle and adjust until the inner edge matches.

Ring Finger Converter Chart
18.2 mmDiameter
9.1 mmRadius
57.2 mmCircumference
260 mm²Area
Built for quick estimates

Measure the way that fits the moment.

Ring Sizer keeps the screen focused on the measurement, with clear values and simple controls for common sizing tasks.

○

Ring diameter

Match an existing ring against the on-screen circle and adjust until the inner edge lines up.

≡

Finger width

Use two horizontal guide lines to estimate finger width directly on the display.

↔

Live conversion

Review useful sizing values such as diameter, radius, area, and circumference while adjusting.

▦

Size chart

Compare estimated measurements with chart values to make sizing decisions easier.

16.8 mm
Simple workflow

Open, adjust, compare.

01

Choose a mode

Start with Ring mode for an existing ring, Finger mode for width, or the converter and chart tools for comparison.

02

Line up the guide

Drag the value controls until the circle or guide lines visually match the item being measured.

03

Read the estimate

Use the live measurement values as a quick sizing estimate before confirming with a jeweler when precision matters.

Advertising verification

App-ads.txt is available at the site root.

Ring Sizer publishes the authorized AdMob seller declaration at /app-ads.txt. Use this domain as the developer website in the app listing, then check for updates in AdMob.

google.com, pub-9862682590297828, DIRECT, f08c47fec0942fa0