Ring Size Chart

A Ring size chart is used to determine the numerical size that best fits your finger. In this guide, weโ€™ll explain how to use a ring size chart to find your perfect fit.

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IN THIS GUIDE
01 What Is a Ring Size? 02 Ring Size Conversion Chart 03 Printable Ring Size Chart 04 Ring Resizing Policy 05 FAQ

Expertiseย you can trust:ย aya is known for its award-winning jewelry designs and seamless, innovative shopping experience. This aya engagement ring guide covers how to use a ring size chart toย determineย your perfect fit, including conversion charts, printable tools, and free sizing resources. All aya guides are meticulously researched and reviewed by our certified gemologists, content, editorial, and brand teams before publication to ensure industry-leading excellence and accuracy.ย 

What Is a Ring Size?

What Is a Ring Size?

Ring size is a number that corresponds to the inner measurement of a ring. In the United States, sizes typically range from 3 to 13 in quarter-size increments. 

A well-fitting ring should feel snug yet comfortable. It should slide over the knuckle with a bit of resistance and sit securely at the base of the finger without feeling tight. The goal is a fit that feels natural and stays in place during daily activities without constriction. 

How to Measure Ring Size

Ring Size Conversion Chart

View the chart below to see how US sizes map to finger circumference and convert to international sizes.

All aya rings are crafted in standardized US sizes. Engagement rings, wedding bands, and fashion rings for both men and women all follow the same size format.

Inside Circumference US, Canada, Mexico UK, Australia, Ireland, New Zealand, South Africa France Germany, Russia, Ukraine, Asia India, China, Japan, South America, Turkey, Israel Italy, Spain, Netherlands, Switzerland
IN MM
1.74 44.2 3 F 44 14 4 4
1.77 44.8 3.25 F 1/2 45 14 1/4 --- 4 5/8
1.79 45.5 3.5 G 45.5 14 1/2 5 5 1/4
1.82 46.1 3.75 G 1/2 46 14 3/4 6 5 7/8
1.84 46.8 4 H 47 15 7 6 1/2
1.87 47.4 4.25 H 1/2 47.5 --- --- 7 1/8
1.89 48 4.5 I 48 15 1/4 8 7 3/4
1.92 48.7 4.75 J 48.5 15 1/2 --- 8 3/8
1.94 49.3 5 J 1/2 49 15 3/4 9 9
1.97 50 5.25 K 50 16 --- 9 5/8
1.99 50.6 5.5 K 1/2 50.5 16 1/4 10 10 1/4
2.02 51.2 5.75 L 51 --- 11 10 7/8
2.04 51.9 6 L 1/2 52 16 1/2 12 11 1/2
2.07 52.5 6.25 M 52.5 16 3/4 --- 12 1/8
2.09 53.1 6.5 M 1/2 53 17 13 12 3/4
2.12 53.8 6.75 N 54 --- --- 13 3/8
2.14 54.4 7 N 1/2 54.5 17 1/4 14 14
2.17 55.1 7.25 O 55 17 1/2 --- 14 5/8
2.19 55.7 7.5 O 1/2 56 17 3/4 15 15 1/4
2.22 56.3 7.75 P 56.5 18 --- 15 7/8
2.24 57 8 P 1/2 57 --- 16 16 1/2
2.27 57.6 8.25 Q 58 18 1/4 --- 17 1/8
2.29 58.3 8.5 Q 1/2 58.5 18 1/2 17 17 3/4
2.32 58.9 8.75 R 59 18 3/4 --- 18 3/8
2.34 59.5 9 R 1/2 60 19 18 19
2.37 60.2 9.25 S 60.5 19 1/4 --- 19 5/8
2.39 60.8 9.5 S 1/2 61 19 1/2 19 20 1/4
2.42 61.4 9.75 T 61.5 --- --- 20 7/8
2.44 62.1 10 T 1/2 62 19 3/4 20 21 1/2
2.47 62.7 10.25 U 63 20 21 22 1/8
2.49 63.4 10.5 U 1/2 63.5 --- 22 22 3/4
2.52 64 10.75 V 64 20 1/2 --- 23 3/8
2.54 64.6 11 V 1/2 65 20 3/4 23 24
2.57 65.3 11.25 W 65.5 --- --- 24 5/8
2.59 65.9 11.5 W 1/2 66 21 24 25 1/4
2.62 66.6 11.75 X 67 21 1/4 --- 25 7/8
2.65 67.2 12 X 1/2 67.5 21 1/2 25 26 1/2
2.68 68.1 12.25 Y 68 --- --- 27 1/8
27 1/8 68.5 12.5 Z 69 21 3/4 26 27 3/4
2.72 69.1 12.75 Z 1/2 69.5 --- --- 28 3/8
2.75 69.7 13 --- 70 22 27 29
How to Measure Ring Size

How to Measure Ring Size

Learn how to measure your ring size with our step-by-step at-home sizing methods, expert tips, and FAQ to help you find the perfect fit with confidence.ย 

Print Ring Size Chart
Ring Resizing Policy

Ring Resizing Policy

Our commitment to you extends beyondย delivery. Here'sย what'sย included with your purchase:ย 

  • Free 1-year resizes:ย Mostย designs can be resized within one year, free of charge.ย 
  • Free 30-day exchanges:ย Most designs, including eternity, open, and alternative metal styles, can be exchanged for any new size withinย 30 days, free of charge.ย 
  • Easy process:ย If you needย a different size, contact us to begin the complimentary resize process.ย We'll confirm a new size with you and resize your ring free of charge.ย Please note that certain restrictions apply.ย 

Additionally,ย aya isย proud to be one of the only jewelry brands to offer inclusive sizing across our entire assortment of engagement rings, wedding bands, and fashion rings, so everyone can find the perfect fit no matter the style.ย 

Learn More

FAQ

What size is my ring?

If you already own a ring that fits well, you canย determineย its size by measuring the inner circumference or by placing it on a . Align the inside edge of the ring with the circle that matches most closely, and the number associated with that circleย indicatesย your size.

What are ring sizes measured in?

Ring sizes are measured using the inside circumference of the ring, typically in millimeters or inches. In the United States, Canada, and Mexico, sizes are expressed as numerical values (for example, size 6 or 7.5). Other systems, such as those used in the United Kingdom, Europe, and Asia, use different scales, including letters or alternate number ranges.ย 

How do I measure ring finger size?

To measure your ring finger size, wrap a flexible measuring tape or a thin strip of paper around the base of your finger.ย Mark where the ends meet, then measure the length in millimeters or inches. That measurementย representsย your finger circumference.

How can I get my ring size?

There are several reliable ways toย determineย your ring size:ย 

  • Use aย ring size conversion chartย to compare an existing ring that fits well.ย 
  • Measure your finger using a string, paper strip, or flexible tape.ย 
  • Order aย free ring sizerย for at-home precision.ย 

Eachย optionย providesย helpful insight, butย professionalย fitting offers the mostย accurateย results. To learn more about measuring from home, visit ourย How to Measure Ring Size guide, orย schedule a personalized appointmentย to aya.ย 

How do I measure ring size using a ring size chart?

A ring size chart displays numerical sizes alongside their corresponding measurements in millimeters or inches.ย To determine your size, locate the row or column that matches your finger circumference.ย 


For example, if your finger measuresย 54 mm, the closest match on the chart corresponds toย approximately aย US size 7. If your measurement falls between two sizes,ย it'sย generally bestย to size up for a more comfortable fit.ย 


When reading a chart, pay attention to the measurement units (millimeters vs. inches) and the sizing system (US, UK, EU, etc.). Most charts are arranged in ascending order, making it easy to compare andย identifyย your size.ย 

Are ring sizes standard?

Ring sizes are not standardized globally. Different countries use their own systems, some based on numbers, others on letters or millimeters. For example, a US size 6 isย approximately equivalentย to a UK size L ยฝ or an EU size 52. Within the same region, however, ring sizes areย generally consistentย across brands.ย