How To Measure Ring Size | UK Ring Size Chart & Guide

Ring Size	Circumference (mm)	Ring Size	Circumference (mm)	Ring Size	Circumference (mm)
A	37.8	J	48.7	S	60.2
B	39.1	K	50.0	T	61.4
C	40.4	L	51.2	U	62.7
D	41.7	M	52.5	V	64.0
E	42.9	N	53.8	W	65.3
F	44.2	O	55.1	X	66.6
G	45.5	P	56.3	Y	67.8
H	46.8	Q	57.6	Z	68.5
I	48.0	R	58.9

How to find your partners ring size

Guess it (not as crazy as it sounds):

Fingers are proportionate to body type so, If your partner is petite, it’s likely that their hands are smaller and slender, start at a size H or I for women, and around an N for men.
If they’re more average in height, chances are they have an average finger size too. An average finger size is L½ for women and Q for men.
If your partner is above average height or build, start at around a ring size N for a woman and a size T for men.

Borrow:

Take a ring they already wear to a jewellers for it to be sized.
Bear in mind that the engagement/wedding ring finger is the third finger on the left hand

Use your own finger:

This is our favourite, slide a ring that they already wear onto your own 'ring finger' and mark with a pen where it gets stuck. Take it to a jeweller and you'll get a very close size.

Downloadable ring size guide

Download and print our simple ring size guide and place a ring over the dotted circles and match the inner diameter to find your ring size. Our guide is perfect for when you want to surprise someone with a perfectly fitting ring.

Also included in the guide is a printable finger measuring strip to help with an accurate size. Please note that this is only a guide and won't take into account the style of your ring. For example, if you are choosing a ring with a wide band, you may need a larger size. If you're in doubt, seek help from your local jeweller.

Download the ring size guide

Helpful Ring Sizing Tips:

Don't worry about taking a risk to make sure your occasion goes to plan. It's about the gesture and the way you propose that counts. It is thought in the industry that around 40% of all engagement rings are resized. You can get in touch with James Porter to help with resizing.
Fingers expand and contract depending on the temperature. It might sound silly but bear that in mind if you're measuring a finger after walking into a jewellers after being out in the cold.
If your knuckle is much larger than your finger’s base, take two separate measurements of both and choose a size in between. A ring should slide over the knuckle but not be too loose to slider around the finger.
If you don't have a printer, you can use string or floss to wrap around a ring finger and mark it with a pet to get a length which you can then measure with a ruler. Bear in mind with this that string can stretch!

JAMES PORTER & SON

JAMES PORTER & SON

Ring Size Guide - How To Measure Ring Size

UK Ring Size Chart

How to find your partners ring size

Downloadable ring size guide

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Helpful Ring Sizing Tips:

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