Compare one ring size across the world in a single view โ India, US & Canada, UK & Australia, EU/ISO, Japan/Asia and Switzerland.
The Ring Size Chart Comparison Tool lets you choose a ring size from one common sizing system and immediately view the closest equivalent labels used by jewellers in other countries. It is designed for international shopping, imported jewellery, travel purchases, gifts and anyone comparing local size labels with an overseas store.
Ring-size labels are not universal. The same physical ring can be called a numerical US size, a lettered UK/Australian size, a millimetre-based European/ISO size, an Indian size, an Asian size, or a Swiss size. The safest common reference is the ringโs inside diameter and inside circumference in millimetres. ISO 8653:2016 specifies ring-size measurement and designation methods, while international jeweller charts use those physical measurements to compare regional labels.
For India-specific sizing, also see our Ring Size Chart India, India Ring Size Converter and Find My Ring Size India tool. For standards background, see ISO 8653:2016 and the GIA international ring size guide.
Select the sizing system you know, then choose the size you want to compare.
Commonly use numerical ring sizes with quarter- and half-size increments. Many North American online jewellery stores list this system first.
Commonly use lettered sizes such as J, K, L, M and N, with half-step labels used by some charts and jewellers.
European charts often use a number closely tied to the ringโs inside circumference in millimetres, making the physical measurement especially easy to compare.
Indian jewellers commonly use a numerical scale. Because seller charts can vary slightly, always confirm the inside diameter or circumference before ordering.
Asian jewellery charts often use another numerical scale. This tool maps the selected physical ring dimensions to a common Asia reference label.
Swiss sizing uses its own numerical labels. Not every source publishes every intermediate Swiss size, so some equivalents are shown as the closest available reference.
| Diameter | Circumference | US / Canada | UK / Australia | EU / ISO | India | Asia | Switzerland |
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Select US/Canada, UK/Australia, EU/ISO, India, Asia or Switzerland.
The second dropdown automatically shows the valid sizes available for that system in this comparison dataset.
The result cards show the closest size used in each major system plus the physical diameter and circumference.
Use the download button to keep a simple comparison record with the source measurement and website attribution.
International ring-size labels are naming systems; the ring itself is a physical circle. The inside diameter tells you the straight-line distance across the opening, while inside circumference tells you the distance around that opening. When two country charts appear to disagree, matching the millimetre measurement is usually more reliable than relying on the label alone.