Online Ring Sizer &
Virtual Ring Try-On
Measure your ring size on your phone in seconds — free, no app download needed. Then enable your camera to virtually try on rings. Click ‘Size Guide’ or scroll down for a printable ring size chart (US, UK, EU, JP). Contact Sales >
Click ‘Size Guide’ to open printable size chart & ring size guide.
Free Online Ring Sizer: Measure Your Ring Size on Your Phone
Use our free virtual ring sizer to measure your ring size online in seconds. Place your finger on your phone screen or enable your camera, and the AI ring size calculator measures your finger width and converts it to US, UK, EU and JP ring sizes. You can even measure every finger at once — no app, no printer and no ring sizer kit needed.
How to Measure Ring Size at Home (3 Easy Ways)
No ring sizer kit? Use any of these methods to find your ring size at home in under 2 minutes.
- Use the free online ring sizer (fastest): Open the ring sizer on your phone, place your finger on the screen or enable your camera, and get your US, UK, EU and JP ring size instantly.
- Measure with string or paper: Wrap a thin strip of paper or string around the base of your finger, mark where the ends overlap, and measure the length in millimeters. This is your finger circumference — match it to the “Circumference” column in the ring size chart below.
- Measure a ring that already fits: Place the ring on a ruler and measure the inside diameter from edge to edge in millimeters. Match it to the “Inside Diameter” column in the ring size chart below.
Tips for an accurate fit:
- Measure at the end of the day when your fingers are largest, and avoid measuring when your hands are cold.
- Make sure the ring can slide over your knuckle.
- Wide bands (6 mm or more) fit tighter — go up half a size.
- If you are between two sizes, choose the larger one.
Ultra-Realistic Virtual Ring Try On
Utilize augmented reality to precisely present the shadow details of rings or gems, and realistically sway with the movement of the fingers.
Perfect Corp.'s AI and AR technologies are favored by international brands, offering exclusive trials on luxury brand official websites.
Try on Any Ring
Choose Your Favorite Gem
Try on Ring Sets
How to Virtually Try On Rings (No App Needed)
Place Finger on Screen
Place your finger on screen for web-based ring size measurement.
Enable Your Camera
Allow camera access in mobile browser to launch virtual ring try-on.
"Try On" & See the Look
Tap the "Try-On" button to instantly preview the look.
Ring Size Chart (US, UK, EU, JP): Printable & Online
Find your ring size by matching your finger circumference or the inside diameter of a ring that fits you. The printable chart below is designed for A4 paper — print it at 100% scale and match your ring at home. Prefer not to print? Use the online ring sizer on your phone instead.
| US / Canada | Inside Diameter (mm) | Circumference (mm) | UK / AU | EU / FR | JP |
|---|---|---|---|---|---|
| 3 | 14.1 | 44.2 | F | 44 | 4 |
| 3.5 | 14.5 | 45.5 | G | 45.5 | 5 |
| 4 | 14.9 | 46.8 | H | 47 | 7 |
| 4.5 | 15.3 | 48.0 | I | 48 | 8 |
| 5 | 15.7 | 49.3 | J 1/2 | 49 | 9 |
| 5.5 | 16.1 | 50.6 | K 1/2 | 50.5 | 10 |
| 6 | 16.5 | 51.9 | L 1/2 | 52 | 11 |
| 6.5 | 16.9 | 53.1 | M 1/2 | 53 | 13 |
| 7 | 17.3 | 54.4 | N 1/2 | 54.5 | 14 |
| 7.5 | 17.7 | 55.7 | O 1/2 | 56 | 15 |
| 8 | 18.1 | 57.0 | P 1/2 | 57 | 16 |
| 8.5 | 18.5 | 58.3 | Q 1/2 | 58 | 17 |
| 9 | 18.9 | 59.5 | R 1/2 | 59.5 | 18 |
| 9.5 | 19.4 | 60.8 | S 1/2 | 61 | 19 |
| 10 | 19.8 | 62.1 | T 1/2 | 62 | 20 |
| 10.5 | 20.2 | 63.4 | U 1/2 | 63.5 | 22 |
| 11 | 20.6 | 64.6 | V 1/2 | 65 | 23 |
| 11.5 | 21.0 | 65.9 | W 1/2 | 66 | 24 |
| 12 | 21.4 | 67.2 | Y | 67 | 25 |
| 12.5 | 21.8 | 68.5 | Z | 68.5 | 26 |
| 13 | 22.2 | 69.7 | Z+1 | 70 | 27 |
Seamless API Integration for Retailers
Seamless API Integration for Retailers
Skip the massive engineering team. Effortlessly integrate our Virtual Ring Try-On API and launch a confidence-boosting tool at an affordable price.
Explore More AI/AR Try On Solutions
Discover endless possibilities with our jewelry try on feature.
Online Ring Sizer & Virtual Ring Try On FAQ
Can I measure my ring size with my phone?
Yes. Open Perfect Corp's free online ring sizer in your mobile browser, place your finger on the screen or enable your camera, and it estimates your ring size in seconds — no app download needed. Results are shown in US, UK, EU and JP sizes.
Is there a free on-screen ring sizer?
Yes. Our virtual ring sizer is free and runs directly in your browser. Place your finger on the phone screen to measure its width and get your ring size instantly, or use the printable ring size chart on this page.
Can AI tell me my ring size?
Yes. AI hand-tracking technology can detect your finger's width through your phone camera and convert it into a ring size. Perfect Corp's AI ring size calculator measures each finger in real time, so you can find the size of every finger at once.
How do I measure my ring size at home?
There are three easy ways to measure your ring size at home:
- Online ring sizer: Use our free ring sizer on your phone for an instant result.
- String or paper: Wrap it around the base of your finger, mark where it overlaps, measure the length in mm and match it to the circumference column in the ring size chart.
- Existing ring: Measure the inside diameter of a ring that fits in mm and match it to the diameter column in the chart.
How big is a size 6 ring?
A US size 6 ring has an inside diameter of about 16.5 mm and a circumference of about 51.9 mm. It equals UK L½, EU 52 and JP 11.
How big is a size 7 ring?
A US size 7 ring has an inside diameter of about 17.3 mm and a circumference of about 54.4 mm. It equals UK N½, EU 54.5 and JP 14.
Is size 7 a big ring size for a woman?
No. Size 7 is close to average — most women in the US wear a ring size between 5 and 7, with 6 being the most common. Finger size varies with height, weight and the finger you wear the ring on, so it is best to measure rather than guess.
Is a size 10 ring big for a woman?
Yes, a US size 10 (about 19.8 mm inside diameter) is larger than average for women, though it is a common men's ring size. If you are unsure, measure your finger with our free online ring sizer before you buy.
How accurate is an online ring sizer?
An online ring sizer is a quick and reliable way to estimate your size. For the best accuracy, measure at the end of the day when your fingers are largest, make sure the ring can pass over your knuckle, and size up half a size for wide bands. If you are between two sizes, choose the larger one.
What is Ring Virtual Try-On Software?
Ring virtual try-on software is an advanced digital tool that enables customers to visualize how rings will look on their fingers without physically trying them on. Utilizing augmented reality (AR) technology, the software overlays digital images of rings onto the customer's live video feed or photos, offering a realistic preview of the design and fit. This real-time visualization allows users to rotate, zoom, and view rings from various angles, making it easier to make informed decisions.
What Are the Benefits of Virtual Ring Try-On?
Virtual ring try-on technology offers several advantages for both businesses and customers:
- Enhanced Customer Experience: Customers can see how rings look on their own fingers in real-time, making it easier to visualize the fit and style before making a purchase.
- Convenience: Virtual try-on eliminates the need for physical store visits. Customers can try on rings from the comfort of their homes, saving time and effort.
- Increased Engagement: Interactive virtual try-on features keep customers engaged and can lead to higher satisfaction and increased likelihood of purchase.
- Reduced Returns: By allowing customers to see how a ring looks on their finger before buying, virtual try-on helps reduce the rate of returns and exchanges due to sizing or style issues.
- Broader Selection: Customers can explore a wider range of ring styles and designs virtually, which might not be available in-store.
- Personalization: Virtual try-on technology can offer personalized recommendations based on the customer’s preferences and finger size.
What are the uses of a Virtual Ring Try-On?
The Virtual Ring Try-On uses and applications include:
- Online Jewelry Shopping: Customers can visualize how rings will look on their hands directly through online platforms and choose the right design and size without visiting a store.
- In-Store Virtual Try-On Kiosks: Retailers can implement Virtual Ring Try-On in-store via tablets or kiosks.
- E-commerce Integration: Jewelry brands can integrate Virtual Ring Try-On into their websites or mobile apps for a seamless, immersive experience.
- Marketing Campaigns: Brands can use the feature in social media and digital marketing to let customers interact with products virtually and share their try-on experience.
