Rim Diamond Ring – Marquise Lab Diamond

AU$3,850.00

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.

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A refined solitaire with a subtle framed detail.

This Rim Diamond Ring features a marquise lab grown diamond, secured by six polished prongs within a setting that extends slightly beyond the edge of the stone. This creates a fine rim-like outline around the diamond, subtly defining its marquise shape and giving the classic solitaire silhouette a more distinctive finish.

From the side, the cathedral-style shoulders rise gently towards the setting, creating an elegant sense of height and structure. The open gallery beneath the diamond keeps the profile light and refined while allowing light to pass through the stone.

Finished with a smooth domed band, this design balances timeless simplicity with considered architectural detail, making it an elegant choice for an engagement ring or a meaningful fine jewellery piece.

This is a made to order item. Please allow around 7 weeks to finish.

Free express shipping for all domestic orders.

The standard or express shipping option is upon customers' choice at checkout for international orders, which cost is calculated at checkout.

For more shipping information, please refer to our shipping policy. here.

All natural and lab diamonds used in James and Irisa jewellery are hand picked with highest quality in the class.

However, to keep your diamond jewellery looking its best for years to come, we recommend avoiding prolonged exposure to chemical compounds such as detergents, shampoos, body wash, cleaning agents, and other household chemicals.

If your diamond jewellery comes into contact with any of these chemicals, simply rinse it gently with clean, warm water and pat it dry with a soft, lint-free cloth. This will help maintain its sparkle and overall condition

Let customers speak for us

from 42 reviews

Kaye F.

09/15/2026

Keeping you close

I love my necklace in white gold dedicated to me from my daughter and grandchildren reflecting the love we share.
I have felt so much support from James and Irisa during this journey I have been on.

Shane W.

08/29/2026

Beautiful piece of Jewellery

Such a stunning ring. Has made one very happy lady. Excellent communication through email and I requested a quicker turnaround time which they were able to do ! Would 100% recommend and use again.

Tom C.

08/10/2026

Amazing piece

Amazing piece, was exactly what we had hoped for - the entire process was fantastic.

Anonymous

08/06/2026

Stunning!

Just wanted to say that I am obsessed with my bespoke ring. It’s so unique and the final product is exactly what I envisioned.

Aimee J.

07/12/2026

Painless Process

Irisa was super helpful and attentive throughout the whole process. I sent through a photo of my fiancée's favourite opal necklace and they found the perfect black opal to match/compliment it. They were also very accommodating around adding in blue sapphires and making sure the order arrived before our trip.

Kaye F.

06/29/2026

My pledge to my loved one

James and Irisa have created beautiful pledge jewellery in memory of my dear husband Colin. I will forever love and value his memory and the jewellery that represents this. Both are amazing.

Carla M.

06/16/2026

A stunning modified Sunray design

My partner and I fell in love with the Sunray design, but wanted a large coloured stone in the centre, and to make some alterations for an entire set of rings including the engagement ring, wedding band and eternity band. The bespoke set that James and Irisa designed for us absolutely exceeded ouur expectations. It is stunning. They made thoughtful modifications to the bands to stay true to the original design but allow for a larger stone. We couldn't be happier.

Melinda O.

06/13/2026

James and Irisa were amazing to work with

James and Irisa were amazing to work with. I wasn't sure what style of weddimg ring would suit my engagement ring. They provided options and were so responsive to any questions and feedback. I received a video to review of the ring to confirm I was happy and then the ring arrived within a couple of days. It is beautifully made and so unique. I couldn't be happier. Thank you so much.

Michael E.

05/02/2026

Amazing bespoke piece

Great communication. Amazing workmanship. Easy process that felt intimate from start to finish. Highly recommend! Thank you so much again!

Joanne T.

03/30/2026

lovely ring

A beautiful piece as always

Mikayla H.

03/21/2026

Highly recommend!!

I recently had my wedding band designed and created by these guys and I absolutely love it. The ring was made beautifully, high quality and exactly what I was hoping for!

Ashlee G.

03/21/2026

Elegance to last a lifetime

Elated doesn’t even begin to describe how we feel after receiving our wedding rings. Intricate and beautiful, we can’t wait to have these on our fingers.
Such a seamless process with thoughtful consultation and expert craftsmanship. So so excited and happy.

Sarah S.

03/16/2026

Beautiful Craftsmanship

Thank you so much for creating such beautiful rings for us. I had rings remodelled using new and existing stones, and am so pleased with the result.The quality of the craftsmanship is beautiful, and the finished rings exceeded my expectations. Communication was clear and easy, and I was kept informed throughout the process. I’m so happy with the result and would highly recommend them to anyone.

Calvin g.

03/12/2026

Such a beautiful ring

Such a beautiful ring. My Fiancé loves it.
The service was unreal so helpful with everything I needed.

Sapphire trilogy ring - 1.18ct pear sapphire

Henry D.

03/02/2026

Engagement Ring and Bespoke Wedding Rings

I found James & Irisa a couple of years ago and always had kept them in mind when the time was right and I couldn't be happier with the quality of their products and customer service. After purchasing a beautiful engagement ring I reached out to see if they could create a custom wedding band based around the design of the ring as well as creating my own custom wedding band which both looked incredible. I would thoroughly recommend James & Irisa and will absolutely be using them again in the future for any jewellery design

Rim Diamond Ring – Marquise Lab Diamond

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