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Ring Size Guide

When buying an engagement ring or wedding ring, it’s important to make sure you find the correct fit. Our International ring size chart along with our free ring sizer will help you find the perfect fit.


>> Download Ring Size Guide <<

Please complete the free ring sizer form to receive your free ring sizer by post. Your free ring sizer will be sent via Royal Mail First Class delivery. If for any reason you don’t receive your free ring sizer, please call us on 01386 641952 and we will get another one in the post to you straight away.

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Loose Diamonds

Natural Diamonds
Formed deep within the earth over billions of years, pushed to the surface through volcanic eruptions, each natural diamond is entirely unique. At 77 Diamonds, we only provide stones that are conflict-free and certified by a leading grading organisation.
Shop Natural Diamonds
Coloured Diamonds
From vibrant yellows to captivating pinks, start creating jewellery that reflects your individuality. Browse our selection of rare coloured diamonds and choose between yellows, pinks, blues, and greys to find the gem that suits you best.
Shop Coloured Diamonds
Lab-Grown Diamonds
A great alternative to natural diamonds, lab-growns hold the same level of brilliance as any other diamond formed in the earth. Created in a laboratory, they are a fine option if you are looking to create decorative jewellery pieces.
Diamond Pairs
Although every diamond is unique, sometimes you do need them to be quite similar. If you are looking to create diamond earrings, look through our collection of matching diamonds to find the perfect fit.
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Diamond Education
Purchasing a diamond can seem complex at first, but it doesn't need to be. From cut, to clarity, to carat: read through our helpful guide to learn everything about loose diamonds.
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Create Your Own
Engagement Ring
Through three simple steps, create an engagement ring that is entirely personal to you. Start with either a central stone or a ring setting, and design your breathtaking piece.
We're Here To Help
Whether you need guidance in choosing the perfect diamond or are generally looking for advice, our expert jewellery consultants are here to assist you.
Ring Size Guide