The most reliable way to determine your ring size is to have your finger professionally measured using a ring sizer. Your ring should slide on comfortably, with just a slight resistance as it passes over the knuckle when removed.

Finger size can vary throughout the day and from month to month due to factors such as temperature or water retention. For the most accurate result, I recommend measuring your finger more than once, ideally at different times of the day.

If you're choosing a ring with a wider band, I generally recommend selecting one size larger for a more comfortable fit.

If you don't have access to a professional ring sizer, you can measure the inside diameter of a ring that already fits you, ideally to the nearest 0.5 mm. Alternatively, measure the circumference of your finger in millimetres using a piece of string or a thin strip of paper. From either of these measurements, I can determine your ring size.