Ring Sizing Guide

How to measure for a ring correctly

Trying to figure out your ring size at home can be tricky, especially if you are buying a ring as a surprise for someone. This ring sizing guide will help you to measure your ring size so that you can be sure of getting the perfect fit. With this ring sizing guide, you’ll be able to find the perfect ring for you in no time!

Do’s

Do figure out the size of the actual finger you intend to wear the ring on – sizes differ by finger but also by hand!
Watch out for Goldilocks – Do make sure you are measuring your finger when you are comfortably warm, not too hot nor too cold, as your finger will swell or shrink accordingly!
Do err on the side of larger if you are in between sizes. It’s a good idea to measure the size of the knuckle you have to get the ring over also – a size in between the knuckle and the finger might be the best bet. It should be a wobble/pull effort over the knuckle though and should not fit easily over, otherwise your ring will fall off!

Don’ts

Don’t measure once. Take the measurement 3 or 4 times, preferably using different methods, to ensure best accuracy.
Don’t assume the size for the left hand finger will be the same on the right, or vice versa.

Method one

Use your local Jeweller

Pop into your local jeweller and ask them kindly to help size your finger. This method is the most accurate way to ensure you get it right.

Method two

Measure your own finger

Wrap a thin strip of paper or length of string around the base of the finger you wish to wear the ring on. If you have larger knuckles measure this too – you may want to select a size in between to allow the ring to slip on comfortably.
Mark the spot where the paper/string meets.
Measure the paper/string’s distance with a ruler.
Use the ring size chart to determine your ring size.

Method three

Measure your own ring

Find a ring you already have that fits the finger you wish to size.
Place it over a ruler and measure the inside ring diameter.
Use the ring size chart to determine your size.

Diameter (mm)	Inside circumference (mm)	NZ, Aus, UK & Ireland	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 14.1	Inside circumference (mm) 44.2	NZ, Aus, UK & Ireland F	USA & Canada 3	France 44	Germany 14	Italy, Spain, Netherland, Switzerland 4	Hong Kong, Macau, Taiwan, Japan, Singapore, China 4
Diameter (mm) 14.3	Inside circumference (mm) 44.8	NZ, Aus, UK & Ireland F ½	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 5 ¼	Hong Kong, Macau, Taiwan, Japan, Singapore, China 5
Diameter (mm) 14.5	Inside circumference (mm) 45.5	NZ, Aus, UK & Ireland G	USA & Canada 3.5	France 45 ¼	Germany 14 ½	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 14.7	Inside circumference (mm) 46.1	NZ, Aus, UK & Ireland G ½	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 6 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China 6
Diameter (mm) 14.9	Inside circumference (mm) 46.8	NZ, Aus, UK & Ireland H	USA & Canada 4	France 46 ½	Germany 15	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China 7
Diameter (mm) 15.1	Inside circumference (mm) 47.4	NZ, Aus, UK & Ireland H ½	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 7 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 15.3	Inside circumference (mm) 48	NZ, Aus, UK & Ireland I	USA & Canada 4.5	France 47 ¾	Germany 15 ¼	Italy, Spain, Netherland, Switzerland 8	Hong Kong, Macau, Taiwan, Japan, Singapore, China 8
Diameter (mm) 15.5	Inside circumference (mm) 48.7	NZ, Aus, UK & Ireland J	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 9	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 15.7	Inside circumference (mm) 49.3	NZ, Aus, UK & Ireland J ½	USA & Canada 5	France 49	Germany 15 ¾	Italy, Spain, Netherland, Switzerland 9 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China 9
Diameter (mm) 15.9	Inside circumference (mm) 50	NZ, Aus, UK & Ireland K	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 10	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 16.1	Inside circumference (mm) 50.6	NZ, Aus, UK & Ireland K ½	USA & Canada 5.5	France 50 ¾	Germany 16	Italy, Spain, Netherland, Switzerland 10 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 10
Diameter (mm) 16.3	Inside circumference (mm) 51.2	NZ, Aus, UK & Ireland L	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 11 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 16.5	Inside circumference (mm) 51.9	NZ, Aus, UK & Ireland L ½	USA & Canada 6	France 51 ½	Germany 16 ½	Italy, Spain, Netherland, Switzerland 12 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 11
Diameter (mm) 16.7	Inside circumference (mm) 52.5	NZ, Aus, UK & Ireland M	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China 12
Diameter (mm) 16.9	Inside circumference (mm) 53.1	NZ, Aus, UK & Ireland M ½	USA & Canada 6.5	France 52 ¾	Germany 17	Italy, Spain, Netherland, Switzerland 14	Hong Kong, Macau, Taiwan, Japan, Singapore, China 13
Diameter (mm) 17.1	Inside circumference (mm) 53.8	NZ, Aus, UK & Ireland N	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 17.3	Inside circumference (mm) 54.4	NZ, Aus, UK & Ireland N ½	USA & Canada 7	France 54	Germany 17 ¼	Italy, Spain, Netherland, Switzerland 15 ¼	Hong Kong, Macau, Taiwan, Japan, Singapore, China 14
Diameter (mm) 17.5	Inside circumference (mm) 55.1	NZ, Aus, UK & Ireland O	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 17.7	Inside circumference (mm) 55.7	NZ, Aus, UK & Ireland O ½	USA & Canada 7.5	France 55 ¼	Germany 17 ¾	Italy, Spain, Netherland, Switzerland 16 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China 15
Diameter (mm) 17.9	Inside circumference (mm) 56.3	NZ, Aus, UK & Ireland P	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 18.1	Inside circumference (mm) 57	NZ, Aus, UK & Ireland P ½	USA & Canada 8	France 56 ¾	Germany 18	Italy, Spain, Netherland, Switzerland 17 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 16
Diameter (mm) 18.3	Inside circumference (mm) 57.6	NZ, Aus, UK & Ireland Q	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 18.5	Inside circumference (mm) 58.3	NZ, Aus, UK & Ireland Q ½	USA & Canada 8.5	France 58	Germany 18 ½	Italy, Spain, Netherland, Switzerland 18 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China 17
Diameter (mm) 18.8	Inside circumference (mm) 58.9	NZ, Aus, UK & Ireland R	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 19	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 19	Inside circumference (mm) 59.5	NZ, Aus, UK & Ireland R ½	USA & Canada 9	France 59 ¼	Germany 19	Italy, Spain, Netherland, Switzerland 20	Hong Kong, Macau, Taiwan, Japan, Singapore, China 18
Diameter (mm) 19.2	Inside circumference (mm) 60.2	NZ, Aus, UK & Ireland S	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 20 ¼	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 19.4	Inside circumference (mm) 60.8	NZ, Aus, UK & Ireland S ½	USA & Canada 9.5	France 60 ¾	Germany 19 ½	Italy, Spain, Netherland, Switzerland 21	Hong Kong, Macau, Taiwan, Japan, Singapore, China 19
Diameter (mm) 19.6	Inside circumference (mm) 61.4	NZ, Aus, UK & Ireland T	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 21 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 19.8	Inside circumference (mm) 62.1	NZ, Aus, UK & Ireland T ½	USA & Canada 10	France 61 ¾	Germany 20	Italy, Spain, Netherland, Switzerland 21 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 20
Diameter (mm) 20	Inside circumference (mm) 62.7	NZ, Aus, UK & Ireland U	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China 21
Diameter (mm) 20.2	Inside circumference (mm) 63.4	NZ, Aus, UK & Ireland U ½	USA & Canada 10.5	France 62 ¾	Germany 20 ¼	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China 22
Diameter (mm) 20.4	Inside circumference (mm) 64	NZ, Aus, UK & Ireland V	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 20.6	Inside circumference (mm) 64.6	NZ, Aus, UK & Ireland V ½	USA & Canada 11	France 64 ¼	Germany 20 ¾	Italy, Spain, Netherland, Switzerland 24	Hong Kong, Macau, Taiwan, Japan, Singapore, China 23
Diameter (mm) 20.8	Inside circumference (mm) W	NZ, Aus, UK & Ireland W	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland 25	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 21	Inside circumference (mm) 65.9	NZ, Aus, UK & Ireland W ½	USA & Canada 11.5	France 66	Germany 21	Italy, Spain, Netherland, Switzerland 25 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 24
Diameter (mm) 21.2	Inside circumference (mm) 66.6	NZ, Aus, UK & Ireland X	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 21.4	Inside circumference (mm) 67.2	NZ, Aus, UK & Ireland X ½	USA & Canada 12	France 67 ¼	Germany 21 ¼	Italy, Spain, Netherland, Switzerland 27 ½	Hong Kong, Macau, Taiwan, Japan, Singapore, China 25
Diameter (mm) 21.6	Inside circumference (mm) 67.8	NZ, Aus, UK & Ireland Y	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 21.8	Inside circumference (mm) 68.5	NZ, Aus, UK & Ireland Z	USA & Canada 12.5	France 68	Germany 21 ¾	Italy, Spain, Netherland, Switzerland 28 ¾	Hong Kong, Macau, Taiwan, Japan, Singapore, China 26
Diameter (mm) 22	Inside circumference (mm) 69.1	NZ, Aus, UK & Ireland Z ½	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 22.2	Inside circumference (mm) 69.7	NZ, Aus, UK & Ireland	USA & Canada 13	France 69	Germany 22	Italy, Spain, Netherland, Switzerland 29 ¼	Hong Kong, Macau, Taiwan, Japan, Singapore, China 27
Diameter (mm) 22.4	Inside circumference (mm) 70.4	NZ, Aus, UK & Ireland Z+1	USA & Canada	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China
Diameter (mm) 22.6	Inside circumference (mm) 71	NZ, Aus, UK & Ireland	USA & Canada 13.5	France	Germany	Italy, Spain, Netherland, Switzerland	Hong Kong, Macau, Taiwan, Japan, Singapore, China

Method four

Match your own ring

To size a ring you already have,

Print out our Ring Sizing Guide to 100% (ensure page scaling is set to “none”)
Check the size is calibrated by measuring the line below on your paper – it should be 5cm.

Find a ring you already have that fits the finger you wish to size.
Lay it directly onto the circles below to find the one where the black circle matches your ring’s inner diameter.
If your size falls somewhere between two sizes, you should opt for the bigger size.

Method five

Request a ring sizer

Request a reusable ring sizer from us (you will need to register with us for your address details).
Once received, simply push the end through the buckle to form a ring shape.
Slip the ring sizer onto the finger you wish to size.
Adjust to give a comfortable fit, checking that it just slips back over the knuckle.
When best fit is achieved, read off size indicated by the arrow.

jamie weir

I cannot recommend Hart and Halo enough. I am so happy with my stunning ring and can’t thank Celeste enough for all the time and energy she put in to designing and crafting it! Celeste was so attentive from start to finish, I couldn't be happier ❤️

Owner's reply
Amazing thank you Jamie. I have to agree with you - she has that real WOW factor! Well done lovely, you did well ;-)

Jess Ensor

The whole process of designing and then making my ring was wonderful. Clear communication with fast response times meant that I felt like I was completely in the loop with how my ring was progressing. I highly recommend and will definitely be getting another special piece of jewellery made in the future!

Owner's reply
Amazing, thanks so much for the lovely feedback Jess - loved working with you and can't wait to start that future exciting project with you! <3

Steph Bergonia-Ward

All I can say is perfection!! They are an amazing team ! All jobs were done fast and to perfection to cater for all the bells and whistles I wanted for my wedding ring. Highly recommend!

Owner's reply
Thank you Steph! Was so lovely working with you, and an honour to bring such a special piece to life for you x

Jane Brooks

We are so lucky to have found Celeste. She was thoughtful, helpful, and went above and beyond in creating our daughters' rings. Thank you again from the Brooks family.

Owner's reply
Thank you lovely Jane et al. Really enjoyed working with you! It was an honour to breathe new life into your great Grandmothers jewels and from them create your own beautiful, sentimental pieces x

Bethany Kennedy

I was nervous to ask someone from another country to design my dream ring without being able to communicate face to face. But Celeste made it really easy and was reassuring with all questions I asked. She created my dream ring and it's flawless. Celeste was a brilliant communicator and her pricing is really competitive. I would do it all again. Thank you Celeste, I am very lucky I found you!🫶

Owner's reply
Absolutely understandable but also so pleased you took the plunge ❤️ You’ve created such a beautiful ring - she was one of my fav Sapphires(!) and you’ve done such a good job showcasing her. Was such a pleasure to work with you Beth, and thank you for the trust xx - Celeste

Jenna Clark

Celeste and my partner did the most amazing job crafting the perfect engagement ring for me! I look at it every day and am overwhelmed by how perfect, thoughtful and beautiful this ring is. I could not have created something so personal and wonderful myself. The quality of the ring and the craftsmanship that has gone into making it is beyond anything I could’ve hoped for! Celeste is also so incredibly helpful, communicative, warm and friendly. Thank you so much Celeste 💙

Owner's reply
So pleased you love your gorgeous creation! 🙌 Alex was amazing to work with and had put so much thought into it - was an absolute pleasure and honour to bring your love story to life in this piece. Truly special - what every engagement ring should be 🥰

Andrea Mazzanti

Celeste had been amazing to work with. She was helpful and available throughout design process which made it very much enjoyable! Thanks to her I got the most beautiful engagement ring I could've hoped for... Luckily my fianceé feels the same. The ring is so beautiful words don't make it justice!

Owner's reply
Thank you so much Andrea - what a beautiful ring you created! Isn't it the best having your very own one-of-a-kind!? Thank you for the trust with your special piece. Enjoy! - Celeste

Amelia S

Couldn't recommend Hart & Halo enough, I had a very specific kind of design in mind that was hard to find. Celeste took my couple of inspo photos, ended up merging a couple of ideas from both and I got my dream ring. The process took about a month and a half and the outcome is perfect. Such stunning quality. Also able to make a large size for me from the get-go for my fat fingers! She was also able to work with me remotely in Chch. Communication was great the whole time, absolutely trusted her and glad I did!

Owner's reply
I am still obsessed with your ring 😅 Such a beautiful, timeless work of art. Was so happy to bring your dream to life for you Amelia - and thank you so much for the trust x

Quinlan Taylor

I had an amazing experience with Hart & Halo. Celete was incredibly attentive throughout the entire process and really helped guide me in making the right decisions for the ring. All I really had at the beginning was an idea of what I thought it should look like, and she completely understood the vision and took every step to help bring it to life. She checked and double checked every detail, answered all my questions, and was super patient with me while I was planning everything while traveling all over the world. Despite the time differences and constant moving around, she made the whole process feel smooth, personal, and stress-free. The final ring turned out even better than I imagined, and I’m genuinely grateful for all the care and effort that went into it. Highly recommend Hart & Halo if you’re looking for a team that truly listens and delivers something special.

Owner's reply
Amazing, thanks so much Quinlan! Those are such kind & thoughtful words - really appreciate you taking the time. And so pleased she’s even better than imagined! Always the goal 😉 Congrats Q&S, and thanks again for the trust with your special piece 🫶 - Celeste

Jack Keeys

What a pleasure to work with Celeste and the team for crafting such a special piece. I was looking for something colourful, creative, and meaningful. Together we crafted a ring where each stone represents the birthstone of a family descendent for my now Fianceé, in a unique design that everyone has loved (and been very impressed with!) Thanks Celeste - what a pleasure :)

Owner's reply
The most meaningful piece ever created. To include each of your parents and grandparents birthstones is truly something else - honouring where you have come from, in where you are going. Thank you so much for the trust with your special heirloom, and wishing you all the love & happiness as you move into your own chapter. - Celeste

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Ring Sizing Guide