Design the perfect ring today

Give your ring a unique touch...

Combine your vision with our craftsmanship and expertise, to create your unique engagement ring. Customise your ring with your preferred diamond cut and Carat weight, precious metals and setting.

With no middleman, you get a unique one-on-one consultation with our top design team to create one of the best engagement rings on the market.

Begin your collaboration with our experts today:

Try on our range of rings

Bespoke Engagement Ring

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Create your own

Bespoke Engagement Ring

Step 01

Select your style:

Designing your custom engagement ring begins with selecting your style. Choose from solitaire, halo or trilogy.

Step 02

Select your diamond shape:

Customise your engagement ring with the diamond shape you love. From Pears to Round Brilliant, Emerald, and beyond.

Step 03

Select your precious metal:

Select the precious metals that best match your everyday style. Choose from Platinum, 18k Rose Gold or Yellow Gold.

Step 04

Finalise your design:

Schedule a consultation to meet the team, then our top engagement ring designers will get down to work to design your dream ring. From there, you can request any amendments and try out samples before your final bespoke engagement ring is made.

The Chalfen Promise

We’re here to make this milestone moment memorable with our unmatched custom engagement ring design services. You can either fill our custom design form or book a virtual consultation with us to begin your journey.

We also promise to...

Access to a world-class design team
Provide complementary engravings on his and her wedding rings to commemorate the special occasion
Accommodate multiple amendments and modifications to ensure that diamond wedding rings are the perfect fit
We only use GIA and Debeers graded diamonds and the highest-grade metals to mould your diamond wedding bands. Along with giving you direct access to unique cut diamond sources
Lifetime manufacturer’s warranty to give you a sense of security
Offer lifetime cleaning and maintenance services for your custom eternity rings
Abide by our 14-day return policy if you happen to change your mind

The combination of our craftsmanship, GIA and De Beers graded diamonds, and your creative input is enough to create the perfect ring.

Are you ready to design your custom engagement ring?

Ring Dia ⌀ (Inside)		Ring Circumference (Inside)		‹ International Standard Sizes ›
MM	Inches	MM	Inches	UK / AU	USA / CA	Europe
9.9	0.390	31.1	1.22	·	0000	·
10.7	0.442	33.7	1.39	·	00	·
11.5	0.454	36.2	1.43	·	0	·
12.0	0.470	37.5	1.50	A	1/2	·
12.2	0.479	38.3	1.51	A 1/2	3/4	·
12.4	0.487	38.9	1.53	B	1	·
12.6	0.506	39.6	1.56	B 1/2	1 1/4	·
12.8	0.503	40.2	1.58	C	1 1/2	·
13.0	0.511	40.8	1.61	C 1/2	1 3/4	·
13.2	0.520	41.5	1.63	D	2	41 1/2
13.4	0.528	42.1	1.66	D 1/2	2 1/4	·
13.6	0.536	42.8	1.68	E	2 1/2	42 3/4
13.8	0.544	43.5	1.71	E 1/2	2 3/4	·
14.0	0.553	44.1	1.74	F	3	44
14.2	0.557	44.5	1.75	F 1/2	3 1/8	·
14.3	0.561	44.8	1.76	F 3/4	3 1/4	·
14.4	0.565	45.1	1.77	G	3 3/8	45 1/4
14.5	0.568	45.4	1.79	G 1/4	3 1/2	·
14.6	0.573	45.7	1.80	G 1/2	3 5/8	·
14.7	0.576	46.0	1.81	H	3 3/4	46 1/2
14.9	0.585	46.7	1.84	H 1/2	4	·
15.0	0.592	47.3	1.86	I	4 1/4	47 3/4
15.3	0.601	48.0	1.89	I 1/2	4 1/2	·
15.4	0.606	48.4	1.90	J	4 5/8	50
15.5	0.611	48.8	1.92	J 1/4	4 3/4	·
15.7	0.618	50.3	1.94	J 1/2	5	·
15.8	0.622	50.6	1.95	K	5 1/8	50
15.9	0.625	50.0	1.97	K 1/4	5 1/4	·
16.0	0.630	50.3	1.98	K 1/2	5 3/8	·
16.1	0.634	50.6	1.99	L	5 1/2	51 3/4
16.3	0.642	51.2	2.02	L 1/4	5 3/4	·
16.4	0.646	51.6	2.03	L 1/2	5 7/8	·
16.5	0.650	51.9	2.04	M	6	52 3/4
16.7	0.658	52.5	2.07	M 1/2	6 1/4	·
16.9	0.666	53.2	2.09	N	6 1/2	54
17.1	0.674	53.8	2.12	N 1/2	6 3/4	·
17.4	0.683	54.5	2.15	O	7	55 1/4
17.5	0.687	54.8	2.16	O 1/2	7 1/4	·
17.8	0.698	55.8	2.20	P	7 1/2	56 1/2
18.0	0.707	56.5	2.22	P 1/2	7 3/4	·
18.2	0.716	57.1	2.25	Q	8	57 3/4
18.4	0.722	57.7	2.27	Q 1/2	8 1/4	·
18.5	0.729	58.2	2.29	Q 3/4	8 1/2	·
18.6	0.733	58.5	2.30	R	8 5/8	59
18.7	0.736	58.7	2.31	R 1/4	8 3/4	·
18.8	0.740	59.1	2.32	R 1/2	8 7/8	·
18.9	0.743	59.3	2.35	R 3/4	9	·
19.1	0.752	60.0	2.36	S	9 1/8	60 1/4
19.2	0.757	60.4	2.38	S 1/4	9 1/4	·
19.3	0.760	60.7	2.39	S 1/2	9 3/8	·
19.4	0.764	61.0	2.40	S 3/4	9 1/2	·
19.5	0.768	61.3	2.41	T	9 5/8	61 1/2
19.6	0.772	61.6	2.43	T 1/4	9 3/4	·
19.8	0.781	62.3	2.45	T 1/2	10	·
20.0	0.780	62.9	2.48	U	10 1/4	62 3/4
20.2	0.795	63.5	2.50	U 1/2	10 1/2	·
20.3	0.800	63.8	2.51	V	10 5/8	63
20.4	0.805	64.2	2.53	V 1/4	10 3/4	·
20.7	0.814	65.0	2.56	V 1/2	11	·
20.8	0.817	65.2	2.57	W	11 1/8	65
20.9	0.821	65.5	2.58	W 1/4	11 1/4	·
20.9	0.824	65.8	2.59	W 1/2	11 3/8	·
21.0	0.830	66.2	2.61	W 3/4	11 1/2	·
21.2	0.834	66.5	2.62	X	11 5/8	66 1/4
21.2	0.836	66.7	2.63	X 1/4	11 3/4	·
21.3	0.838	66.9	2.64	X 1/2	11 7/8	·
21.5	0.846	67.5	2.66	Y	12	67 1/2
21.7	0.854	68.1	2.68	Y 1/2	12 1/4	·
21.9	0.861	68.8	2.71	Z	12 1/2	68 3/4
22.1	0.870	69.4	2.73	Z +1/2	12 3/4	·
22.3	0.879	70.2	2.76	Z+1	13	·
22.6	0.890	71.0	2.80	Z+1.5	13.5	·
22.7	0.893	71.3	2.81	Z+2	·	·
22.9	0.902	72.0	2.83	Z+2.5	·	·
23.0	0.908	72.5	2.85	Z+3	·	·
23.3	0.915	73.0	2.87	Z+3.5	·	·
23.5	0.924	73.7	2.90	Z+4	·	·
23.6	0.927	74.0	2.91	Z+4.5	·	·
23.9	0.940	75.0	2.95	Z+5	·	·
24.3	0.955	76.2	3.00	Z+6	·	·

Design the perfect ring today

Give your ring a unique touch...

Try on our range of rings

Bespoke Engagement Ring

Bespoke Engagement Ring

Bespoke Engagement Ring

Bespoke Engagement Ring

Create your own

Bespoke Engagement Ring

Bespoke Engagement Ring

Bespoke Engagement Ring

Bespoke Engagement Ring

Step 01

Select your style:

Step 02

Select your diamond shape:

Step 03

Select your precious metal:

Step 04

Finalise your design:

The Chalfen Promise

We also promise to...

About Chalfen of London

Customer Service

Get in touch

Bespoke Services

About us

Find your ring size with our International Conversion Chart