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How Can You Determine Your Ring Size?

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The ring sizing guide will give you suggestions and charts for finding your partners size of ring. If you’re going to surprise her with a ring then how are you going to know which size ring to buy?

If you buy online or offline at a reputable store then they will resize it free of charge but it’s always best to find near the right size in the first place. Also you may get confused with metric and imperial measurements so there’s a handy conversion chart that can be found further down the page.I Don’t Know Her Size How Will I Find It?

There are many methods of “covert measuring ” and below are the best ways to get exactly what you want. From asking family, friends or generally just being downright sneaky this guide has it all. Ask The Family! Good idea or bad idea? Yes! Your partner’s mother may know her daughter’s ring size but do you really want her to know your secret? Can she keep that secret or will she let the cat out of the bag?

If you have a good relationship with any of your partner’s family then go on and ask. If you would rather keep it a secret then explore further down the page for more options.

How Can You Determine Your Ring Size?

Ask Her Best Friend!

Best friends share everything and I bet they have swapped rings in the past. I mean why not? They’re always sharing clothes, shoes and secrets! Which brings me to my next point…will the best friend be able to control herself or will the excitement of knowing just be to much? Especially if it’s a secret engagement ring!

It’s an option that’s worth considering. Could you really trust the best friend to keep quiet? Even so, the best friend may be able to give you some extra advice on just the kind of ring your future fiancée may prefer i.e. big, bold, simple, gold, platinum, diamonds ….etc.

Get Sneaky!

Borrow her ring! Does your partner take her rings off when she goes to bed or when she takes a bath? Could you be sneaky enough to take one of her rings for a ring sizing and be able to return it with out her noticing? If the answer is yes then you have a winner.

It sounds blatantly obvious but make sure to get the right ring! E.g. A thumb ring won’t do you any favors unless you’re ring sizing for another thumb ring!

I’ve Borrowed A Ring How Will I Get The Measurements?

In this part of the ring sizing guide you will get some great tips and pointers of how to do the measuring thing without her knowing….. If you have time and you are able to get out of the house, run down to your local jewelers with the borrowed ring and they will be able to tell you the exact ring sizing in just a few minutes.If you don’t have that kind of time try the ring on yourself by gently forcing the ring down your finger as far as it will go (without damaging it!) and mark with a pen where the ring fits your finger. This can then be roughly measured by using a piece of string or a narrow strip of paper (or similar).

Another good method is to use a tapered candle instead of your finger. If you can’t trust your own measurements then take yourself and your marked finger / candle off to your local jewelers for a ring sizing session.

This will always be the more accurate way of doing it. Modeling clay, bread or soap can leave a very good imprint that can be measured (don’t forget to clean the ring or she’ll get suspicious!) Alternatively, trace the inside of her ring on a piece of paper and use it to find her measurements.  How you do it is up to you. Perhaps by now you’ve been inspired to come up with your own ring sizing ideas.

Ring Sizing Do’s/ Don’ts And Useful Tips

The first thing to remember is that all her fingers will be different sizes the dominant hand (e.g. right or left handed) is slightly larger than the other.  If she’s right handed her left hand fingers will be approximately 1/2 a size smaller in US standard measuring terms. So keep in mind which finger the ring is for.For an engagement ring you’ll need the fourth finger on the left hand which was made popular by the Romans as its rumored to be the LuuuurrrrV finger! You’ll make things much easier from the outset by getting hold of a set of templates from a jeweler.

Blue Nile will send you a set of ring sizing templates free of charge. If the ring isn’t going to be a surprise then you can get your dearest to use a set of ring sizings, just make sure that her hands are at room temperature and her fingers have expanded to their fullest for the day. Just before bedtime is a good time.

This method is not completely foolproof because her fingers can vary in diameter at different times of the day, different times of the month, after exercise, when there’s high humidity, the list is practically endless.

Don’t oversize!  Over sizing can result in lost rings especially in the winter when hands become cold and fingers shrink a little. It may seem more comfortable on fingers to wear slightly over sized rings but it’s a much better option to go for a specially designed “comfort fit” option that is rounded so that less of the ring is in contact with the skin. That way she can get used to having a snug fit that won’t end up bouncing down a storm drain in the middle of a cold spell!Unlike metal rings and plastic ring sizers, fingers and knuckle joints are not perfectly round so the best you can hope to achieve is a ring that fits snugly and offers a small amount of resistance when being removed. Rings that are designed to be wide and flat should be a little looser in the fit, to allow comfortable passage over the knuckle when removing.

Average US Sizings – The average ring sizing for a US woman is between 6 and 8 (L/Q UK). A standard woman’s sample size in a jewelry store is size 7. As a comparison the standard sample size for a man is size 10. Always remember not to panic if it doesn’t fit snugly. A reputable jeweler will resize a ring for free if you bought it from them and they will also do it for a fee if you didn’t.You can use the ring sizing charts below to convert millimeters to inches and US to UK and Japanese ring sizing.

Ring Sizing Chart And Size Conversion Charts

Millimeters Inches Millimeters Inches

 Conversion

 Chart
25.4 millimeters 1 inch
6.35 millimeters 1/4 of an inch 31.7 millimeters 1 1/4 inch
9.52 millimeters 3/8 of an inch 38.0 millimeters 1 1/2 inch
12.7 millimeters 1/2 of an inch 44.5 millimeters 1 3/4 inch
15.8 millimeters 5/8 of an inch 50.8 millimeters 2 inches
19.0 millimeters 3/4 of an inch 57.2 millimeters 2 1/4 inches
22.2 millimeters 7/8 of an inch 63.5 millimeters 2 1/2 inches

How is it worked out?  Millimeters divide by 25.4 = Inches

US-CAN / UK and Japanese ring sizing equivalents: Please be aware that these are intended as a rough guide only. An exact ring sizing is probably impossible but all good jewelers will be able to resize a ring no problem!

Ring Sizing Guide

Number Sizes

Wheat Sheaf
www.engagement-ring-advice.com USA British/Irish Japanese

Inside

Inside

Inside

Inside

Canada Australian Equivalent
Diameter Diameter Circumference Circumference

Standard

South African
 (inches)  (mm)

 (inches)

(mm)

  Equivalent
0.458 11.6 1.438 36.5 0
0.466 11.8 1.463 37.2 1/4
0.474 12.0 1.488 37.8 1/2 A
0.482 12.2 1.513 38.4 3/4 A 1/2
0.490 12.4 1.539 39.1 1 B 1
0.498 12.6 1.564 39.7 1 1/4 B 1/2
0.506 12.9 1.589 40.4 1 1/2 C
0.514 13.1 1.614 41.0 1 3/4 C 1/2
0.522 13.3 1.639 41.6 2 D 2
0.530 13.5 1.664 42.3 2 1/4 D 1/2
0.538 13.7 1.689 42.9 2 1/2 E 3
0.546 13.9 1.714 43.5 2 3/4 E 1/2
0.554 14.1 1.740 44.2 3 F 4
0.562 14.3 1.765 44.8 3 1/4 F 1/2 5
0.570 14.5 1.790 45.5 3 1/2 G
0.578 14.7 1.815 46.1 3 3/4 G 1/2 6
0.586 14.9 1.840 46.7 4 H 7
0.594 15.1 1.865 47.4 4 1/4 H 1/2
0.602 15.3 1.890 48.0 4 1/2 I 8
0.610 15.5 1.915 48.7 4 3/4 J
0.618 15.7 1.941 49.3 5 J 1/2 9
0.626 15.9 1.966 49.9 5 1/4 K
0.634 16.1 1.991 50.6 5 1/2 K 1/2 10
0.642 16.3 2.016 51.2 5 3/4 L
0.650 16.5 2.041 51.8 6 L 1/2 11
0.658 16.7 2.066 52.5 6 1/4 M 12
0.666 16.9 2.091 53.1 6 1/2 M 1/2 13
0.674 17.1 2.116 53.8 6 3/4 N
0.682 17.3 2.141 54.4 7 N 1/2 14
0.690 17.5 2.167 55.0 7 1/4 O
0.698 17.7 2.192 55.7 7 1/2 O 1/2 15
0.706 17.9 2.217 56.3 7 3/4 P
0.714 18.1 2.242 56.9 8 P 1/2 16
0.722 18.3 2.267 57.6 8 1/4 Q
0.730 18.5 2.292 58.2 8 1/2 Q 1/2 17
0.738 18.7 2.317 58.9 8 3/4 R
0.746 18.9 2.342 59.5 9 R 1/2 18
0.754 19.2 2.368 60.1 9 1/4 S
0.762 19.4 2.393 60.8 9 1/2 S 1/2 19
0.770 19.6 2.418 61.4 9 3/4 T
0.778 19.8 2.443 62.1 10 T 1/2 20
0.786 20.0 2.468 62.7 10 1/4 U 21
0.794 20.2 2.493 63.3 10 1/2 U 1/2 22
0.802 20.4 2.518 64.0 10 3/4 V
0.810 20.6 2.543 64.6 11 V 1/2 23
0.818 20.8 2.569 65.2 11 1/4 W
0.826 21.0 2.594 65.9 11 1/2 W 1/2 24
0.834 21.2 2.619 66.5 11 3/4 X
0.842 21.4 2.644 67.2 12 X 1/2 25
0.850 21.6 2.669 67.8 12 1/4 Y
0.858 21.8 2.694 68.4 12 1/2 Z 26
0.866 22.0 2.719 69.1 12 3/4 Z 1/2
0.874 22.2 2.744 69.7 13 27
0.882 22.4 2.769 70.3 13 1/4 Z1
0.890 22.6 2.795 71.0 13 1/2
0.898 22.8 2.820 71.6 13 3/4 Z2
0.906 23.0 2.845 72.3 14 Z3
0.914 23.2 2.870 72.9 14 1/4
0.922 23.4 2.895 73.5 14 1/2 Z4
0.930 23.6 2.920 74.2 14 3/4
0.938 23.8 2.945 74.8 15
0.946 24.0 2.970 75.4 15 1/4
0.954 24.2 2.996 76.1 15 1/2
0.962 24.4 3.021 76.7 15 3/4
0.970 24.6 3.046 77.4 16

Always try to remember that ring sizing isn’t an exact science and a comfortable, reasonably snug fit is the best way to go.