How to Measure Your Ring Size at Home – Full Guide (With Charts in CM, MM & US)

Finding your ring size can feel tricky—but it doesn’t have to be. Whether you're shopping for an engagement ring, a gift, or treating yourself, knowing your accurate ring size is essential to ensuring comfort, security, and the perfect fit.

In this expert guide by Diana M Jewels, you'll learn multiple accurate ways to measure your ring size at home, view actual-size printable ring charts, and explore conversion tables in US, cm, mm. Plus, we'll answer frequently asked questions from real users searching on Google and AI platforms.

Quick Summary:

 

How to Measure Ring Size at Home – 4 Proven Methods

1. Use a Printable Ring Size Chart (Actual Size)

This is one of the most accurate and easy methods.

Steps:

• Print a ring size chart at 100% scale.
  

• Take a ring that fits you well.
  

• Match the inner edge of your ring to the printed circles.
  

Tip: Make sure your printer is not set to "fit to page" or it may distort sizes.

Perfect for: Lab Grown Rings, Pre-Owned, Wedding Bands

2. Measure With String, Paper & Ruler

Tools Needed:

• Thin string or paper strip
  

• Ruler with millimeters (mm)
  

• Pen
  

Instructions:

1. Wrap the string around your finger.
   

2. Mark where it overlaps.
   

3. Measure the length in millimeters.
   

4. Divide the result by 3.14 to get the diameter.
   

5. Match that to a US ring size in our chart below.
   

This method is best for measuring ring size in cm or mm, and is great if you're shopping Rings by Diamond Color.

3. Use a Ring You Already Own

If you already have a ring that fits the intended finger, you can:

• Measure the inner diameter with a ruler or caliper.
  

• Match the measurement on our diameter chart.
  
  

4. Use a Ring Sizer Tool

Buy a plastic or metal ring sizing tool from Amazon or jewelry stores. This is the most precise method and perfect for buying expensive pieces like High Jewelry.

 

Actual Ring Size Chart (US, Diameter in mm, Circumference in cm)

Ring Size Conversion – US to CM & MM

 

Tips for Getting the Right Fit

• Measure in the evening when fingers are slightly swollen.
  

• Don’t measure if your hands are cold — they shrink slightly.
  

• If you’re between sizes, size up.
  

• For wide bands, go half a size up for comfort.
  
  

Common Mistakes to Avoid

• Using fabric measuring tape (too thick)
  

• Printing ring charts at incorrect scale
  

• Guessing without measuring both hands (dominant fingers can differ)
  

If you’re interested in more jewelry education, check out:

• 👉 How Are Lab Grown Diamonds Made
  

• 👉 CVD vs HPHT Diamonds
  

• 👉 Lab Created vs Simulated Diamonds
  

• 👉 Do Lab Grown Diamonds Hold Their Value?
  
  

Ready to Shop by Ring Type?

Find rings based on your size & style:

• Lab Grown Rings

• White Diamond Rings

• Yellow Diamond Rings

• Sapphire Rings

• Emerald Rings

• Ruby Rings

• Toi et Moi Rings

• Wedding Bands

• Men's Jewelry
  
  

Conclusion: Your Ring Size, Perfected

Finding your correct ring size at home isn’t just possible—it’s simple. Whether you're preparing for a proposal, shopping engagement rings, or gifting yourself something special, this guide ensures you’ll get the perfect fit every time.

Need personal assistance? Contact us at Diana@dianamjewels.com or book a custom appointment for handcrafted designs.