Selecting the right ring size is an essential step in ensuring your jewellery fits comfortably and looks stunning. In this comprehensive guide, we’ll delve into the world of international ring sizing, covering both millimetres and inches. Whether you’re shopping online or at a local jeweller, these instructions will help you confidently determine the perfect ring size for any occasion.
Step 1: Gather Your Materials
Before you start, make sure you have the following:
- A soft measuring tape.
- An existing ring that fits well (optional).
- Access to an international ring size chart with inside diameter and inside circumference measurements in both millimetres and inches.

Step 2: Measure Your Finger
2.1 Using a Soft Measuring Tape:
- Wrap the measuring tape around the base of the intended finger.
- Take note of the measurement in millimetres and inches.
- For accuracy, repeat the process a few times and average the results.
2.2 Using an Existing Ring:
- Measure the inside diameter of a well-fitting ring in millimetres.
- Use the international ring size chart to find the corresponding size.
Step 3: Consult the International Ring Size Chart
3.1 Finding Your Size:
- Locate your measured size on the International Ring Size Chart (scroll down to see).
- Take note of the corresponding size in both millimetres and inches.
3.2 Understanding Circumference:
- Some charts may provide both diameter and circumference measurements.
- Circumference is the measurement around the inside of the ring, useful for certain styles.
Step 4: Consider Comfort and Style
4.1 Comfort Fit vs. Standard Fit:
- Choose between a comfort fit and a standard fit based on your preference for rounded or traditional edges.
4.2 Width of the Ring:
- Wider rings may require a slightly larger size for a comfortable fit.
- Keep this in mind, especially for designs with a substantial width.
Step 5: Seek Professional Guidance
- Visit a local jeweller for professional sizing assistance.
- Confirm your size with a jeweller, especially if you’re between sizes.
