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Shopping for a ring online? Getting the right size matters, especially when you’re investing in a piece meant to last a lifetime. Whether you’re selecting an engagement ring, wedding band, or just browsing fine jewelry, a ring size chart can help you shop with confidence.
Why Use a Ring Size Chart?
A ring size chart is a reference tool that helps you convert finger measurements into standard ring sizes used in different countries. Since there is no universal global sizing system, charts make it easier to compare and convert sizes between US, UK, EU, Japanese, and Australian formats.
Credit: PriceScope Member, ksluice
If you’re buying a ring from an international vendor or surprising someone with a gift, a ring size chart ensures a better fit and less guesswork.
Find Your Ideal Diamond
PriceScope’s Diamond Search gives you access to hundreds of thousands of natural and lab-grown diamonds from trusted vendors like Whiteflash, James Allen, and Blue Nile. Compare options side by side and use advanced filters to narrow down by cut, color, clarity, and carat to find the diamond that matches your preferences and budget.
International Ring Size Conversion Chart
The following ring size conversion chart includes the most commonly used sizing systems in the United States, United Kingdom, Europe, Japan, and Australia. Use this table to quickly compare sizes across regions.
Credit: PriceScope Member, McLaren
US Size | UK Size | EU Size (mm) | Japan Size | Australia Size | Inside Diameter (mm) |
4 | H½ | 47 | 7 | H½ | 14.8 |
5 | J½ | 49 | 9 | J½ | 15.7 |
6 | L½ | 52 | 11 | L½ | 16.5 |
7 | N½ | 54.5 | 14 | N½ | 17.3 |
8 | P½ | 57 | 16 | P½ | 18.1 |
9 | R½ | 59 | 18 | R½ | 18.9 |
10 | T½ | 62 | 20 | T½ | 19.8 |
11 | V½ | 64 | 23 | V½ | 20.6 |
12 | X½ | 67 | 25 | X½ | 21.4 |
Measurements are approximate and can vary slightly depending on ring width and style.
Ring Size Chart US vs UK: Understanding the Differences
US Ring Size Chart
The US ring size chart uses a numeric system (e.g., 4–13 for adults), including half sizes for better precision.
UK Ring Size Chart
The UK ring size chart, by contrast, uses letters from A to Z, often with half letters like “L½.”
Credit: PriceScope Member, foxglove
If you’re browsing rings from a UK-based vendor, refer to the conversion chart above or look for vendor tools that auto-convert sizes. Many PriceScope vendors, including Whiteflash, James Allen, and Blue Nile offer both US and UK sizing options at checkout.
Get Answers from Real People
Join the PriceScope Forum and connect with shoppers, enthusiasts, and industry experts who share their experiences and insights every day. From ring sizing tips to diamond cut comparisons, the forum is the place to ask questions and receive unbiased advice before you buy.
What Are the Most Common Ring Sizes?
Knowing the average can be a good starting point if you’re unsure of someone’s size:
- Average US Women’s Ring Size: 6–7
- Average US Men’s Ring Size: 9–10
- Average UK Women’s Ring Size: L½ to N
- Average UK Men’s Ring Size: R½ to T½
These averages may vary depending on finger shape and lifestyle. For example, someone who works with their hands regularly may prefer a slightly looser fit.
Shop Premium Diamond Collections
PriceScope highlights top collections known for exceptional cut quality and design. View Whiteflash A CUT ABOVE®, James Allen True Hearts™, and Astor by Blue Nile™, which are chosen for their brilliance and precision. These collections make it easy to focus on diamonds already vetted for superior beauty.
If you don’t know your size, measuring at home is easier than you think. You can use a printable ring sizer, string and ruler, or a ring you already own.
Tips for Finding the Right Fit
Choosing the right size goes beyond just numbers. Keep these tips in mind:
- Finger size fluctuates throughout the day and with temperature. Measure at the end of the day when fingers are largest.
- Wider bands may feel tighter, consider sizing up by a quarter or half size.
- International orders? Always double-check the chart or contact the vendor for clarification.
- For surprise gifts, discreetly borrow a ring they wear on the intended finger and have it sized by a jeweler or ask close friends or family.
Start with Trusted Guidance
The PriceScope Diamond Buying Guide is a step-by-step resource that explains cut, color, clarity, and carat along with the tools used to judge diamond performance. Whether you are new to buying or want a deeper understanding, this guide helps you make confident decisions with practical knowledge.
Use the PriceScope Forum and Available Tools
Need help? The PriceScope Forum is filled with shoppers and experts who can guide you through ring sizing and conversions.
Browse trusted vendors with helpful sizing tools and customer service support:
Final Thoughts
Whether you’re shopping in the US, the UK, or halfway around the world, using a ring size chart makes it easier to find a beautiful ring that fits just right. Refer to the chart above when browsing vendors, and when in doubt, don’t hesitate to visit the PriceScope Forum and ask questions for help.
Protect What Matters Most
After choosing the right ring, safeguard it with specialized coverage. PriceScope recommends BriteCo Jewelry Insurance for engagement rings and fine jewelry, offering fast online quotes, zero deductibles, and coverage up to 125% of the appraised value. From loss and theft to damage or mysterious disappearance, BriteCo provides peace of mind that your ring is protected.
