Ring Size Guide


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When shopping for rings in-store and online, we want to make sure that the ring you love fits like a charm! 

In this Guide, we’ll dispel some common myths floating around on the Internet and provide some reliable tips on how to determine ring size, including an international ring size chart, so you can get it right.

DON’T use a piece of string or paper to measure ring size

Some websites suggest wrapping a piece of string around the finger, marking the place where the ends overlap and then finding the corresponding size on a ring size chart. Other sites suggest using a strip of paper to determine ring size, again by wrapping the strip around the finger and then marking the paper with a pen or pencil where it overlaps. Both methods lead to inaccuracies: String can stretch and paper can be easily damaged. Humidity and temperature can cause paper to shrink and curl.

Also, when you measure ring size this way, you’re not taking into consideration the size the ring needs to be to slip over the finger joint or knuckle. For most people, the joint is larger than the rest of the finger. If you only measure where the ring sits on the finger, you might not be able to push it over the joint when the time comes to put it on for the first time. Plus, you lose the element of surprise with this method, and if it’s not a surprise, you should ask your jeweller for help. Considering the symbolic value and cost of an engagement ring, you’ll want to determine ring size using more accurate methods. Read on for some reliable ones.

DO ask a jeweller to measure ring size

The best way to get the right fit is to have your beloved visit the jeweler with you and have the jeweler determine her ring size. A jeweler will probably use a set of finger gauges, often called a ring sizer, which contains a series of metal bands in ½ size increments that slide onto the finger to measure it for the most secure fit and best comfort. Your jeweler will also know how to factor in temperature, humidity, altitude and even time of day, which can also affect finger size. This takes any uncertainty and guessing out of the process.

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If you want to keep the element of surprise, you can always “borrow” a ring from her jewelry box and take it to a jeweler yourself. Just make sure it’s a ring she often wears on a ring finger as opposed to one she wears on her middle finger, thumb or index finger, as these will not be the same size. In addition, for a person who is right-handed, the left ring finger is typically smaller than the right ring finger by about half a size and vice versa.  Let the jeweler know if the ring you’ve brought is usually worn on the right or left hand and which hand is dominant.

To measure an existing ring, the jeweler will typically use a ring mandrel – a tapered cylindrical tool – that is marked with ring sizes. As with a finger gauge set, it can measure in half as well as full sizes. If the band is unusually wide, take the measurement from the center.

If none of these options work for you, some online merchants offer plastic ring sizers. These can give a fairly accurate measurement of her ring size.

Jisha Ring Mandrel

Determine ring size with paper and pencil

Borrow one of your beloved’s favorite rings (again, a ring she wears on her ring finger), preferably one with a plain and unadorned band. Get a pencil and trace the inside of the ring on a piece of paper. This is a good way to determine her ring size.

A few more tips about ring size

If you’re still nervous about determining her ring size, here are a few things you should know for extra assurance that the ring you’re getting will be the perfect fit:

  • Buy a larger ring: It is easier to remove metal from a ring that’s too big than add metal to a ring that’s too small.
  • Shank size matters: Rings with wide shanks usually need to be a bit larger, as they will fit more snugly. Bridal sets wider than 4 or 5 mm when the band and engagement ring are worn together require special consideration. Be sure to consult your jeweler about how best to handle this.
  • Beads: Small gold balls can be added to the inside of a ring that’s too big to make it fit tighter and keep it from turning on the finger. This is especially helpful for people with larger finger joints. Additionally, jewelers can install mechanical shanks for people suffering from arthritis.
  • Weather, altitude and time of day: Fingers shrink in the cold and swell in the heat. Consequently, not only can a measurement taken on a winter day differ from one taken mid-summer, but a measurement taken on a cool morning can also differ from one taken in the afternoon, as the temperature rises. Likewise, high and low humidity can cause a finger to swell or shrink. So can altitude – like flying and mountain climbing. Be mindful of this when you pick her ring size.

Ring Size Conversion Chart

Determining your ring size can be tricky without the proper tools. Use our Ring Size Conversion chart below to find your ring size in different countries. Need help? Speak with an Expert now by Contacting Us HERE

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Now that you’re armed with these tips on how to determine ring size, you’ll be ready to surprise your bride-to-be with a ring that fits perfectly on her finger. If you need any further assistance please feel free to Contact Us.