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Build Your Own Diamond Ring

Your ring, your story.

Choose your setting, handcrafted in our Melbourne studio, then pair it with a lab-grown diamond carefully filtered for quality by our gemologists. Every stone and setting is thoughtfully curated, so you can create your ring with confidence.

IGI Certified

Melbourne Handcrafted

Complimentary Resizing

The Process

Three steps to your perfect ring

Choose a Setting

Browse our curated collection — solitaires, halos, trilogies and more. Select your metal, shape and size. Every setting is handcrafted in our Melbourne studio.

Select Your Diamond

Browse our gemologist-approved inventory. Every stone passes our quality and proportion criteria. Each comes with a IGI certificate.

Complete Your Ring

Review your final combined ring price, confirm your build, and place your order. Once your order is placed, our Melbourne studio will begin carefully crafting your ring with attention to every detail.

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Choose Your Setting

Melbourne Handcrafted

Made to order · 7 weeks production

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Setting Name

Compatible shapes

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Complete ring price with a recommended centre diamond.

Melbourne Made

Ready in 7 weeks

Metal 18k Yellow Gold

Diamond Shape Round

Ring Size Select size

Your Build Summary

Setting—

Metal18k Yellow Gold

Diamond ShapeRound

Ring Size—

Production Time7 weeks

Ring From

Complete ring price with a recommended centre diamond.

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Setting details

Handcrafted in our Melbourne studio using recycled precious metals. Each setting is made to order — allow around 7 weeks from order confirmation.

Shipping & delivery

Free express shipping Australia-wide. International shipping calculated at checkout.

Full shipping details

Care & warranty

Complimentary first resize guarantee. 5-year manufacturer's warranty.

Full warranty details Full jewellery care details

Setting · Metal

Shape · Size

Confirm Your Diamond

IGI Certified

Certificate #—

View Certificate

Lab Grown · IGI Certified

Diamond

Complete Ring Price

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Includes setting + this centre diamond

Flexible payment options available at checkout

Available · Inventory validated just now

Stone decision

How would you like to proceed?

Handcrafted in our Melbourne studio

Responsibly sourced diamonds and precious metals

One complimentary ring resize included

Worldwide shipping available

Diamond Grade Guide

Understand this diamond

Understand cut, colour, clarity, and carat in plain language.

Choosing the right ring size is crucial for comfort and security. Whether you’re buying a ring as a surprise or for yourself, it’s important to get the size right the first time. This guide provides detailed methods to measure your ring size accurately at home, ensuring you find the perfect fit.

Manual Measurement Using String or Paper

Step 1: Gather Your Tools

A piece of non-stretchy string or a thin strip of paper
A ruler with millimeter (mm) markings
A fine-tip marker or pen

Step 2: Measure Your Finger

Wrap the String or Paper Around Your Finger: Ensure it fits snugly but isn’t too tight.
Mark the Overlap Point: Use a marker to indicate where the string or paper overlaps.
Measure the Length: Lay the string or paper flat and use a ruler to measure the distance from the start to the marked point.

Step 3: Find Your Ring Size Using the Chart Below

Use your finger’s circumference measurement to determine your ring size from the chart:

Inside Diameter (mm)	Inside Circumference (mm)	AU/UK Size	US/CA Size
13.1	41.1	D	-
13.3	41.7	D 1/2	2
13.5	42.4	E	-
13.7	43.0	E 1/2	2.5
13.9	43.6	F	-
14.1	44.2	F 1/2	3
14.3	44.9	G	-
14.5	45.5	G 1/2	3.5
14.7	46.1	H	-
14.9	46.8	H 1/2	4
15.1	47.4	I	-
15.3	48.0	I 1/2	4.5
15.5	48.6	J	-
15.7	49.3	J 1/2	5
15.9	49.9	K	-
16.1	50.5	K 1/2	5.5
16.3	51.2	L	-
16.5	51.8	L 1/2	6
16.7	52.4	M	-
16.9	53.0	M 1/2	6.5
17.1	53.7	N	-
17.3	54.3	N 1/2	7
17.5	54.9	O	-
17.7	55.6	O 1/2	7.5
17.9	56.2	P	-
18.1	56.8	P 1/2	8
18.3	57.4	Q	-
18.5	58.1	Q 1/2	8.5
18.8	59.0	R	-
19.0	59.6	R 1/2	9
19.2	60.3	S	-
19.4	60.9	S 1/2	9.5
19.6	61.5	T	-
19.8	62.2	T 1/2	10
20.0	62.8	U	-
20.2	63.4	U 1/2	10.5
20.4	64.0	V	-
20.6	64.7	V 1/2	11
20.8	65.3	W	-
21.0	65.9	W 1/2	11.5
21.2	66.6	X	-
21.4	67.2	X 1/2	12
21.6	67.8	Y	-
21.8	68.4	Y 1/2	12.5
22.0	69.1	Z	-
22.2	69.7	Z 1/2	13
22.4	70.3	Z+1	-
22.6	71.0	Z+1 1/2	13.5
22.8	71.6	Z+2	-

Additional Tips for Accurate Sizing

Measure at the Right Time: Your fingers can change size throughout the day. Measure your finger at the end of the day when your fingers are at their largest to ensure the best fit.
Consider Knuckle Size: If your knuckle is larger than the base of your finger, you may need to size up. Measure both your knuckle and the base, then choose a size that fits comfortably over your knuckle.
Double-Check: It’s a good idea to measure multiple times to ensure accuracy.

Why Accurate Sizing Matters

Getting the correct ring size ensures that your ring is comfortable to wear and stays securely on your finger. A ring that’s too tight can be uncomfortable and difficult to remove, while a ring that’s too loose may slip off and get lost. By following these methods, you can confidently determine your ring size at home and ensure your new ring fits perfectly.

Still Have Questions?

At James and Irisa Jewellery, we’re here to help with any additional questions you may have. If you’re uncertain about your measurements or need more personalized advice, please feel free to reach out. We’re committed to ensuring you find the perfect fit for your jewellery.

Contact us today for expert advice and to explore our collection of beautiful, perfectly fitting rings.

Open full ring size guide

Diamond summary

Complete Ring

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James & Irisa

The James & Irisa Difference

A more considered ring-buying experience, shaped by craftsmanship, guidance, and long-term care.

IGI Certified

Every selected centre diamond is independently graded for confidence and transparency.

Melbourne Handcrafted

Each setting is made in our Melbourne studio with attention to finish, balance, and lasting wear.

Complimentary Resizing

Ongoing after-care designed to make the final fit feel effortless.

Ethically sourced materials

Expert Craftsmanship

Worldwide Shipping

RJC Certified Australian Gold

Real Stories, Real Sparkle

Acknowledgement of Country

We acknowledge the Traditional Owners of the land on which we work and live, and pay our respects to Elders past, present, and emerging. We recognize their continuing connection to land, waters, and culture, and we honor their rich heritage as the original custodians of Australia.

Your ring, your story.

Three steps to your perfect ring

Choose a Setting

Select Your Diamond

Complete Your Ring

Choose Your Setting

Setting Name

Recommended by James & Irisa

Diamond

How would you like to proceed?

Understand this diamond

The James & Irisa Difference

IGI Certified

Melbourne Handcrafted

Complimentary Resizing

Currency