There are numerous measurement systems for rings around the world depending on your country of origin. We can custom-make your ring using any of these measurement systems. Below is a chart for your reference detailing the sizes for each country. Ring sizes can be measured physically using a plastic or metal ring sizer, or by measuring the girth of a ring that already fits. You may also get your finger measured by a professional shop to ensure accuracy. Many online tools are also available such as www.findmyringsize.com (US sizes), which can guide you through this process. For complete accuracy, we would recommend that a professional measurement be taken, to ensure you get the perfect size desired.