Blogs: The Sparkle Journal

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Blogs: Shine + Tell

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What Is A Solitaire Ring?

What Is A Solitaire Ring?

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The Milgrain Ring Buyer’s Guide

The Milgrain Ring Buyer’s Guide

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2025 Mother's Day Gift Guide

2025 Mother's Day Gift Guide

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All Things Asscher Cut Rings: Get To Know The Looks

All Things Asscher Cut Rings: Get To Know The Looks

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Pinky Promise: Rose Gold Morganite Engagement Rings

Pinky Promise: Rose Gold Morganite Engagement Rings

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All Things Lab Diamond Rings: Get To Know The Gemstone

All Things Lab Diamond Rings: Get To Know The Gemstone

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What Are Shapes? Picking the Perfect Center Stone

What Are Shapes? Picking the Perfect Center Stone

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A Match Made in Heaven: Rose Gold Moissanite Engagement Rings

A Match Made in Heaven: Rose Gold Moissanite Engagement Rings

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Most Popular

What Is A Solitaire Ring?

What Is A Solitaire Ring?

Read more

The Milgrain Ring Buyer’s Guide

The Milgrain Ring Buyer’s Guide

Read more

2025 Mother's Day Gift Guide

2025 Mother's Day Gift Guide

Read more

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Ring Size Conversion Guide

This ring size chart is based on our closest conversions. When in doubt, size 1/4 size up for a slightly looser fit and vice versa.

US/Canada	Inside Diameter (mm)	Inside Circumference (mm)
3	14.05mm	44.14mm
3 1/4	14.25mm	44.77mm
3 1/2	14.45mm	45.40mm
3 3/4	14.65mm	46.02mm
4	14.86mm	46.68mm
4 1/4	15.04mm	47.25mm
4 1/2	15.27mm	47.97mm
4 3/4	15.53mm	48.79mm
5	15.70mm	49.32mm
5 1/4	15.90mm	49.95mm
5 1/2	16.10mm	50.58mm
5 3/4	16.30mm	51.21mm
6	16.51mm	51.87mm
6 1/4	16.71mm	52.50mm
6 1/2	16.92mm	53.16mm
6 3/4	17.13mm	53.82mm
7	17.35mm	54.51mm
7 1/4	17.45mm	54.82mm
7 1/2	17.75mm	55.76mm
7 3/4	17.97mm	56.45mm
8	18.19mm	57.15mm
8 1/4	18.35mm	57.65mm
8 1/2	18.53mm	58.21mm
8 3/4	18.69mm	58.72mm
9	18.89mm	59.34mm
9 1/4	19.22mm	60.38mm
9 1/2	19.41mm	60.98mm
9 3/4	19.62mm	61.64mm
10	19.84mm	62.33mm
10 1/4	20.02mm	62.89mm
10 1/2	20.20mm	63.46mm
10 3/4	20.44mm	64.21mm
11	20.68mm	64.97mm
11 1/4	20.85mm	65.50mm
11 1/2	21.08mm	66.22mm
11 3/4	21.24mm	66.73mm
12	21.49mm	67.51mm
12 1/4	21.69mm	68.14mm
12 1/2	21.89mm	68.77mm
12 3/4	22.10mm	69.43mm
13	22.33mm	70.15mm

Choosing the right size can be tricky, there are some instances where you may have to size up or down. Learn more in our Size Guide Page.

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