Size Chart

Ring size chart for converting your ring size to MM

Ring size calculator: How to measure ring size with easy methods?

Method 1: Using Vernier Caliper / Ruler.

Here is another method of determining ring size – using a caliper. All you need is an existing ring and a caliper, and follow the steps.

1. Start by checking for any zero errors by closing the jaws and ensuring the zero marks on the main and vernier align perfectly.
2. Place your ring band between the jaws and ensure it is perpendicular to the caliper's jaws.
3. Slowly close the jaws until the grip is secure on the ring band.
4. Measure the outside diameter of the ring.
5. Measure the ring thickness.
6. Use this formula to measure the inner diameter: Outside Diameter (OD) - Thickness (TH) - Thickness (TH ) = Inner Diameter (ID)

Method 2: Use the String or Paper

If you don’t have a ring to measure:

1. Cut a thin strip of paper or use a piece of string.
2. Wrap it around the base of your finger (where the ring will sit).
3. Mark the point where it overlaps.
4. Measure the length in millimetres — this is your finger circumference.
5. Divide by 3.14 (π) to get the diameter, then check the Ring Size Chart.

Method 3: Visit a Jeweler

For the most accurate measurement, visit a jewelry store and ask them to measure your finger using a ring sizer tool.

Useful tips for measuring ring size 

Getting the perfect ring size demands precision. You need to consider factors like temperature, time of day, knuckle size, and long-term wearability.  Here’s how to ensure accuracy:

1. Measure when your hands are warm: Finger size fluctuates due to temperature, hydration, and even sodium intake. Measure in a neutral environment, when your hands are warm but not swollen from exercise or high salt consumption.
2. Take multiple readings: Measure at different times over a few days. Your fingers are slightly larger in the evening, making it the best time for a final measurement.
3. Knuckle vs. Finger base: If you have prominent knuckles, choose a size that slides over them with slight resistance but isn’t too loose at the base. A ring that spins is too big, while one that requires excessive force is too small.
4. Ring Style Matters:
• Narrow bands (under 3mm) fit true to size.
• Wide bands (over 5mm) create a snugger fit—size up by ½.
• Stackable rings need a slightly larger size for flexibility.
5. Use a professional sizing tool: A jeweler's mandrel or ring sizer provides the most reliable results. Printable charts can be helpful but may vary slightly.
6. Plan for long-term fit: Finger size can shift due to weight changes, pregnancy, or aging—choose a size with slight flexibility, especially for lifelong pieces like wedding bands.

FAQ's

1. Can I use a string to find my ring size?

Yes, but ensure it’s non-stretchable and wrapped snugly without compressing the skin.

2. How do I convert my ring size from US to European or Indian size?

Ring size conversions vary by country:

• India uses a simple numbering system (commonly 6 to 23).
• US/Canada also use numbers, but the scale is different (e.g., India 11 = US 6).
• UK uses letters (e.g., India 11 = UK L).
• Europe uses the inner circumference in millimeters (e.g., India 11 = EU 51.5).

Because half sizes may differ between systems, the most accurate way to convert is by using the ring’s inner diameter or circumference and checking a reliable Ring Size Chart.

💡 Example:

• India Size 11 = US 6 = UK L = EU 51.5 (≈ 16.5 mm diameter).

3. How to measure ring size at home?

Measure when fingers are at normal temperature—cold shrinks, heat swells. Use a thread, ring sizer, or even an existing ring. For best accuracy, measure multiple times throughout the day.

4. How do you tell if a ring is too loose or too tight?

A properly fitted ring slides on smoothly and resists slightly at the knuckle. If it spins freely or leaves deep indentations, it’s either too loose or too tight. You can always refer to a ring size chart in cm for better accuracy.

5. What is the standard ring size for women/men?

Women’s average size is 6-7, men’s is 9-10, but bone structure, lifestyle, and climate affect fit. Wider bands need larger sizes, while thinner bands fit more snugly. Refer to the US ring size chart.