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For the best ring size measurement, we recommend ordering a free ring sizer from either Blue Nile or James Allen. These ring sizer tools work better than paper and string which can both stretch—causing an inaccurate measurement. You can also measure the inside diameter of an existing ring and compare it to a ring sizing chart like the one below.
Wondering what your ring size is or how to figure out ring size? Whether you’re shopping for the perfect engagement ring or an anniversary ring or eternity band, you’ll need to know the correct ring size. And if you’re planning a surprise proposal, you’ll need this information well in advance.
Luckily, there are several ways to find the ideal ring size for your special someone. While you can always get the ring resized if it’s not quite right, the excitement of wearing the ring proves better if you have the correct size from the start.
Our guide includes a ring size guide, insider tips on measuring and the best places to buy a diamond ring once you know the size.
To determine your partner’s ring size or yours, order a free ring sizer, print a sizing tool, or measure a current ring. These sizing methods help determine the ring size for both men and women.
Experts suggest avoiding using paper or string to measure ring size. Both materials can stretch or twist, causing your ring measurement to be inaccurate. James Allen also offers a complimentary online sizing tool here. If you feel like you want something nicer because you’ll use it more than once, there are ring sizer tools being sold on Amazon for a few bucks.
If you don’t want to use the methods above for determining ring size, you can visit a jewelry store for professional measurement, or have a close friend or family member gather the ring size information. Parents or friends may have purchased jewelry for your partner in the past, or have access to their jewelry collection. They can also covertly ask their ring size (just in case you ‘happen’ to propose).
Remember that not knowing the ring size doesn’t have to spoil your proposal plan. Go with your best estimate using the ideas above, and opt for a half size up when in doubt.
The ring can also be resized after the proposal. Most diamond sellers, like Blue Nile and James Allen, offer complimentary ring resizing within a certain time frame. Be sure to know ahead of time what the free resize period is at your particular vendor so you don’t miss out on this service.
A ring sizing chart can help you determine the ring size—no matter which measuring method you use. Based on the ring size circumference or diameter, you can find the size that matches.
Any of these tools help you measure a finger or an existing ring.
No matter how you receive your measurement, you can use the chart below to determine the proper size.
If you have a measurement for the ring’s circumference, use the circumference column.
If you have a measurement for a ring’s diameter, use the diameter column.
The chart below is both a men’s ring size chart and a ring size chart for women.
|Circumference (mm)||Diameter (mm)||UK, Europe, Australia||United States & Canada||China, Singapore, Japan||Hong Kong||Switzerland|
|44.8||14.3||F 1/2||5||5 1/4|
|46.1||14.7||G 1/2||6||6 1/2|
|47.4||15.1||H 1/2||7 3/4|
|50.6||16.1||K 1/2||5 1/2||10||12|
|51.9||16.5||L 1/2||6||11||13||12 3/4|
|53.1||16.9||M 1/2||6 1/2||13||14.5||14|
|54.4||17.3||N 1/2||7||14||16||15 1/4|
|55.7||17.7||) 1/2||7 1/2||15||17||16 1/2|
|57.0||18.1||P 1/2||8||16||17 3/4|
|58.3||18.5||Q 1/2||8 1/2||17||19|
|60.8||19.4||S 1/2||9 1/2||19||22|
|63.4||20.2||U 1/2||10 1/2||22||24||22 3/4|
|65.9||21.0||W 1/2||11 1/2||24||26|
|67.2||21.4||X 1/2||12||25||27.75||27 1/2|
|68.5||21.8||Z||12 1/2||26||28 3/4|
*Data from the Blue Nile International Ring Size Chart
The average ring size for men is between 8 and 10.5. Men’s ring sizes usually range from 8 to 14, with size 9 being the most common.
The average ring size for women is between 5 and 7. Women’s ring sizes typically range from 3 to 9, with size 6 being the most common.
Measuring ring size is pretty straightforward, but you should still keep in mind the following tips to ensure your measurement is as accurate as possible.
Now that you have a plan for how to measure ring size, you can focus on finding the most stunning diamond ring at the best price. The first step is finding a reputable and reliable vendor who offers well-cut diamonds at excellent prices.
Throughout our years of experience in the diamond industry, we’ve vetted several diamond dealers. We have a consistent pulse on the companies you can trust.
For the best diamond cuts at an exceptional value, we recommend:
Our goal is for you to end up with the most exceptional diamond ring at an exceptional price. To achieve this, you need to keep in mind important components when assessing a diamond’s beauty and value. You want to spend in the areas that matter, and scale back in areas that’ll go unnoticed.
We recommend closely reviewing the diamond yourself or having a diamond expert assist you.
Be sure to follow our expert recommendations:
Reach out to us today to begin your complementary diamond search.
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