
Shopping for rings online can be challenging, especially when trying to figure out the right ring size. Ring sizes aren’t standardized across the globe, and different countries use different sizing systems. Understanding ring size conversions is essential if you’re buying a lab-grown diamond ring from Bianca Chiara or any other international retailer. This blog will guide you through the various international ring sizing systems and how to convert them.
Understanding Different Ring Sizing Systems
Different countries use their own methods for determining ring size. Below are the most common sizing systems used worldwide:
1. US & Canada
The United States and Canada use a numerical scale, usually ranging from size 3 to 13 for women. Men’s sizes often start at size 7 and go up to size 15. Half and quarter sizes are common, allowing for more precise fits.
2. UK & Australia
The UK and Australia use an alphabetical system for ring sizes. The letters range from A to Z, with half sizes like D½ or K¾ for in-between measurements. This system may seem tricky if you’re used to numbers, but the conversion is simple.
3. Europe
European countries, including France, Germany, and Italy, use a numerical system based on the circumference of the ring in millimeters. European sizes generally range from 41 to 76. Unlike the US, these sizes do not use half sizes, making conversions a bit more challenging.
4. Japan
Japan, as well as other countries like China and South Korea, uses a numerical system that generally ranges from 1 to 27. These numbers correspond to the inner diameter of the ring.
5. Switzerland
Swiss ring sizes are similar to the European system but slightly adjusted. Swiss sizes generally add 40 to the European measurement, so a European size 50 would be a Swiss size 90.