Ring Sizer – Size Your Finger

Find your ring size right on your iPhone. Measure an existing ring on screen or measure your finger without a ring, then get your diameter, circumference, and ring size in US, UK, EU, and JP sizing systems.

No printing, paper size charts, account, or extra tools required. Whether you're buying a ring, choosing a gift, or helping a customer find the right size, you can get the measurements you need in seconds.

IDEAL FOR

• Finding your ring size before buying jewelry online • Measuring an existing ring that already fits • Measuring your finger when you don't have a ring • Choosing a ring size for a gift, engagement, or wedding • Helping customers compare ring sizes across different sizing systems

KEY FEATURES

◆ MEASURE AN EXISTING RING Place a ring on your iPhone screen and adjust the on-screen guide to match its inner edge. Get its diameter, circumference, and corresponding ring size.

◆ NO RING? MEASURE YOUR FINGER Don't have a ring to measure? Use the finger measurement flow to find your size without an existing ring or a printed size chart.

◆ US, UK, EU & JP RING SIZES See your result in US, UK, EU, and JP sizing systems, making it easier to shop from jewelers and stores that use different size standards.

◆ DIAMETER & CIRCUMFERENCE Get more than a ring size. View the measured diameter and circumference to help compare sizes and check jewelry measurements.

◆ NO PRINTING OR EXTRA TOOLS Measure with your iPhone without printing a ring sizer or using a ruler, measuring tape, or other equipment.

◆ QUICK & SIMPLE Open the app, choose how you want to measure, and get your result in seconds. No account or lengthy setup required.

FREQUENTLY ASKED QUESTIONS

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