Option 1: Book a Showroom Appointment
The easiest and most accurate way to determine your ring size is to book a private appointment with one of our expert consultants. During your visit, we will professionally measure your finger to ensure the perfect fit.
Option 2: Order Our Complimentary Ring Size Guide
Can’t pop in? Our complimentary ring size guide includes a plastic measuring tool that fastens comfortably around the finger, allowing you to determine the exact size that aligns with Theadore sizing.
How it works
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Click the link and add the ring size guide to your cart (don’t worry — it’s complimentary).
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Insert the end of the ring sizer through the buckle and gently pull to tighten.
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Slide the loop onto your desired finger and adjust until it feels comfortable and snug. It should be secure enough to stay on, but still able to slide off with a little resistance.
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The letter displayed in the centre of the magnified area is your recommended ring size. If the fit feels most comfortable between sizes, we can also accommodate half sizes.

Option 3: Measure an Existing Ring Using Our Online Guide
If you’re planning a surprise proposal, measuring a ring your partner already owns can be one of the easiest approaches. Simply find a ring they wear on their ring finger, then compare it to the sizing chart in our online guide to determine the closest match.
Tips for getting the most accurate measurement:
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Choose a ring worn on the same finger the engagement ring will sit on.
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Place the ring over the sizing chart circles and find the closest match.
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Return the ring promptly so they don’t notice it’s missing.
Choosing an engagement ring should be an exciting experience, not a stressful one. If you’re unsure about sizing, our team is always happy to assist. Simply email hello@theadoreandco.com