Ring Size

Determine Your Ring Size from the Comfort of Your Own Home

What if the Ring is a Surprise for Your Partner?

In this case, you’re going to have to do a little detective work to find out your partner’s ring size. Here are a few helpful tips:

Ask one of her friends- and swear them to secrecy.

Borrow one of her rings and trace inside of it on a piece of paper- bring that with you to a jeweller and get them to measure it or download our online Printable Ring Sizer to measure it at home.

Take your partner ring shopping, but tell her you’re on the hunt for a present for your mom or sister. Encourage her to try on a ring and pay attention to the size.

If you have to guess, remember that it is easier to resize a ring down than up, so pick a larger size than you think she really is.

British \| Irish Australian Size	US \| Canada Size	Inside Diameter (inches)	Inside Diameter (mm)	Inside Circumference (inches)	Inside Circumference (mm)
F 1/2	3	0.554	14.1	1.74	44.2
G	3.25	0.562	14.3	1.765	44.8
G 1/2	3.5	0.57	14.5	1.79	45.5
H	3.75	0.578	14.7	1.815	46.1
H 1/2	4	0.586	14.9	1.84	46.7
I	4.25	0.594	15.1	1.865	47.4
I 1/2	4.5	0.602	15.3	1.89	48
J	4.75	0.61	15.5	1.915	48.7
J 1/2	5	0.618	15.7	1.941	49.3
K	5.25	0.626	15.9	1.966	49.9
K 1/2	5.5	0.634	16.1	1.991	50.6
L	5.75	0.642	16.3	2.016	51.2
L 1/2	6	0.65	16.5	2.041	51.8
M	6.25	0.658	16.7	2.066	52.5
M 1/2	6.5	0.666	16.9	2.091	53.1
N	6.75	0.674	17.1	2.116	53.8
N 1/2	7	0.682	17.3	2.141	54.4
O	7.25	0.69	17.5	2.167	55
O 1/2	7.5	0.698	17.7	2.192	55.7
P	7.75	0.706	17.9	2.217	56.3
P 1/2	8	0.714	18.1	2.242	56.9
Q	8.25	0.722	18.3	2.267	57.6
Q 1/2	8.5	0.73	18.5	2.292	58.2
R	8.75	0.738	18.7	2.317	58.9
R 1/2	9	0.746	18.9	2.342	59.5
S	9.25	0.754	19.2	2.368	60.1
S 1/2	9.5	0.762	19.4	2.393	60.8
T	9.75	0.77	19.6	2.418	61.4
T 1/2	10	0.781	19.8	2.443	62.1
U	10.25	0.788	20	2.468	62.7
U 1/2	10.5	0.794	20.2	2.493	63.3
V	10.75	0.802	20.4	2.518	64
V 1/2	11	0.81	20.6	2.543	64.6
W	11.25	0.818	20.8	2.569	65.2
W 1/2	11.5	0.826	21	2.594	65.9
X	11.75	0.834	21.2	2.619	66.5
X 1/2	12	0.842	21.4	2.644	67.2
Y	12.25	0.85	21.6	2.669	67.8
Y 1/2	12.5	0.858	21.8	2.694	68.4
Z	12.75	0.866	22	2.719	69.1
Z+1	13.25	0.882	22.4	2.769	70.3

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Determine Your Ring Size from the Comfort of Your Own Home

What if the Ring is a Surprise for Your Partner?

Request A Free Ring Sizer

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