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Shop nowRing Size Guide: Find Your Perfect Fit
Choosing a ring is a meaningful moment, whether it symbolizes love, commitment, or personal celebration. But even the most beautiful diamond engagement ring or wedding ring set for women loses its charm if the fit isn’t right.

The right size ensures comfort, security, and elegance in every moment. This guide will help you measure your ring size accurately and understand what makes a perfect fit, so your lab grown diamond jewelry feels as special as it looks.

1. What Is Ring Size?
Ring size refers to the internal circumference or diameter of a ring that fits your finger comfortably. Everyone’s finger shape is unique, and it can change slightly with temperature, movement, and time of day.
Understanding your correct size ensures your ring, whether a custom engagement ring, diamond wedding band for women, or lab grown diamond engagement ring, sits securely without feeling tight and can be worn confidently every day.
2. How to Measure Ring Size at Home

2.1 Using an Existing Ring
If you already have a ring that fits perfectly, it’s one of the easiest ways to find your size. Place the ring flat and measure the inner diameter using a ruler or caliper. Then compare your result with a standard ring size chart. This method works best when the ring is perfectly round and not stretched or bent.
2.2 Paper or String Method
Wrap a thin strip of paper or string around the base of your finger and mark where the ends meet. Measure that length in millimeters to find your finger’s circumference. Repeat this process twice for accuracy and make sure the strip moves easily over your knuckle. This simple method is helpful when measuring at home.

2.3 Request a Free Sizing Guide From Katanoff
We provide a free sizing guidance service for customers in New York and beyond. Contact us, share your measurements or ring photo, and our experts will guide you to your correct size. Whether you’re planning to design your own engagement ring, create a custom lab grown engagement ring, or buy diamond stud earrings, precise sizing ensures your jewelry fits perfectly.
3. Professional Ring Sizing
For maximum accuracy, visiting a professional jeweler is always recommended. At Katanoff, our specialists in New York measure your finger, consider comfort, and help you choose the best fit for your ring type and lifestyle.
This is especially useful when selecting a luxury engagement ring, custom diamond jewelry, or an engagement ring and wedding band set. Our goal is to make sure every piece feels as perfect as it looks.

4. Essential Ring Sizing Tips
- Measure your finger in the evening when it’s naturally at its largest.
- Avoid measuring when your hands are cold or right after physical activity.
- Wider bands, such as men’s diamond wedding bands or gold and diamond tennis bracelets, may require a slightly larger size for comfort.
- A proper ring should glide on easily and need a gentle pull to remove, secure yet comfortable.
5. International Ring Size Chart
This chart makes it easier to find your size when shopping internationally for diamond tennis bracelets, diamond hoop earrings, or necklaces for women.
| US Size | India | UK | EU | Diameter |
|---|---|---|---|---|
| 5 | 9 | J 1/2 | 49 | 15.7 mm |
| 6 | 12 | L 1/2 | 52 | 16.5 mm |
| 7 | 14 | N 1/2 | 54.5 | 17.3 mm |
| 8 | 16 | P 1/2 | 57 | 18.1 mm |
| 9 | 18 | R 1/2 | 59.5 | 18.9 mm |
6. Characteristics of a Perfect Fit
A perfectly fitted ring should feel natural and comfortable. It should slide over your knuckle with light resistance and stay in place without spinning.
Whether it’s a diamond solitaire, custom diamond jewelry, or a lab grown engagement ring, the right size ensures your ring becomes part of your everyday elegance.
Final Thoughts
Finding your correct ring size ensures lasting comfort and confidence. At Katanoff, we help you discover your perfect fit while offering a curated collection of lab grown diamond jewelry, diamond stud earrings, and engagement rings for her.
From custom engagement rings and diamond tennis necklaces to cross necklaces for women and men’s diamond earrings in gold, every piece is crafted with precision and passion.
Explore our full collection in New York to create your engagement ring, choose your perfect women’s tennis bracelet, or find the ideal heart solitaire pendant that fits beautifully and lasts a lifetime.





