To help you choose the right size for your SPJ piece, we’ve created a simple ring sizing conversion chart below. Whether you’re measuring in UK, US, or international sizes, this guide makes it easy to find the perfect fit.All of our rings are crafted in UK sizes, and the chart shows how these correspond to finger circumference and diameter, along with international conversions.

If you’re based in the UK, we’re delighted to offer a complimentary ring sizer — you’ll only need to cover the shipping. Simply add the sizer to your cart and complete checkout, and we’ll send it directly to your door. This allows you to measure with accuracy and be confident that your ring will fit perfectly. While the complimentary ring sizer is a helpful guide, if you’re still unsure about your size, we highly recommend visiting a local jewellery store for a professional measurement. This is the most accurate and reliable way to ensure a perfect fit — especially for unique, one-of-a-kind pieces that cannot always be easily resized.