Ring Sizer Downloads & RevenueRing Sizer – Size Your Finger · App Store

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

How can I find my ring size with my iPhone?
You can measure an existing ring directly on your iPhone screen or use the finger measurement flow if you don't have a ring.

Can I measure a ring I already own?
Yes. Place a ring that fits you on the screen and adjust the guide to its inner edge to determine its measurements and size.

How can I find my ring size without a ring?
Use the finger measurement flow. It lets you estimate your ring size without an existing ring or a printed ring sizer.

Which ring size systems are supported?
The app shows ring sizes in US, UK, EU, and JP systems, along with diameter and circumference.

Can I use it when buying a ring as a gift?
Yes. If you have access to a ring that fits the person, you can measure it on your iPhone and use the result when comparing ring sizes.

Is this useful for jewelers and jewelry sellers?
Yes. Jewelers and sellers can use it as a quick way to measure rings and compare sizes across US, UK, EU, and JP sizing systems.

SUBSCRIPTION INFORMATION

Payment will be charged to your iTunes Account at confirmation of purchase. Your subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period. The renewal cost depends on the selected subscription plan. Your account will be charged f