• Our dominant hands are generally slightly larger – measure the hand you plan to wear the ring on.   
• Consider the design of your ring. Rings with wider bands will fit tighter. Plan to size up by at least a half size for chunky bands (>4mm) and size down accordingly for very thin designs (<1.3mm). Note that ring sizes are generally measured in millimeters (mm) and are not sized by inch.   
• Ensure your body temperature is normal – fingers tend to shrink when cold and expand when hot.   
• Fingers change size throughout the day based on the water we drink and the food we eat – the best time to measure is towards the middle or end of the day.  
• If your knuckle is pronounced, you may want to measure both the knuckle and the base of the finger. Then, choose a size in between those measurements as rings need to fit over the knuckle but not be too loose or tight to wear comfortably.   

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What's Your Ring Size?
International Ring Size Table