Like shoe sizing, ring sizing varies from region to region. Unlike shoe sizes, there aren't separate systems for ladies' and men's.
At Wabi Sabi & Me, we use the standardized U.S. finger size system which denotes sizing with numbers. Some countries like the U.K. and Australia, denote with letters. Below is a helpful chart that lets you convert your size across regional standards.
Most people don't realize that finger size can change due to factors like weather, pregnancy, weight gain/loss etc. On a hot day, your fingers will expand, and likewise on a cold day, they will contract. After pregnancy, women often don't go back to their pre-pregnancy finger size even if they have lost the baby weight.
When in doubt, order a size that is slightly larger than your true size. Any jeweler will tell you that it is much easier to adjust a ring size down rather than up (within reason, of course.) And there are little tricks like tying a rubber band to the bottom of your ring to make it snug if it's a little too loose but there are no tricks to make it fit if it's too small.
Be aware that some designs or manufacturing methods do not allow for size adjustments.
Pro tip: when buying chunky rings, or rings with very wide shanks, go 1/4 to 1/2 size larger because they fit more snuggly on fingers. This usually only applies to shanks that are 7mm and above.
The best and most accurate way to measure your finger size is to have your local jeweler size you. He/she will slip onto your finger sizing bands of various circumferences and ask which one feels best for you (not too loose, not too tight.) It is a trial and error process until he/she finds one that fits you best.
If you can't get to a jeweler, don't despair, here's a step-by-step guide to measuring your ring size at home:
Step 1: decide which finger you will wear the ring.
Some factors to consider here might be how chunky the design is. You may want to wear more chunky rings on your index or middle finger instead of the ring finger for aesthetics but also consider how "rounded" the shape of the ring is, the rounder the shape (i.e. bombé designs), the more spread out your finger will be; this may feel ok on the index finger but may not be comfortable at all on the ring finger, imagine having to walk around with your ring finger splayed out all day. Ouch.
Step 2: find a ring that you already own that fits the finger you decided on.
If you can find one, take a ruler and measure the INSIDE diameter of the ring in millimeters. I emphasize INSIDE again. You do not want to take into account the thickness of the ring you're measuring. With the inside diameter, use the chart below to figure out your size. Simple!
Step 3: you don't already own a ring that fits.
In this case, you will need to improvise a bit. Take a length of string and wrap it around the desired finger. The closer the thickness of the string is to the actual ring, the better, meaning don't attempt this with dental floss - it's too thin and flimsy to get good results. You can also use twist ties or zip ties. Once you've formed a "ring" with your string, twist tie, or zip tie, follow step 2!
If you have a printer:
You can use the below make-shift sizer, however, you MUST make sure that the length between A and B is 3.5 inches. Printing this out at 100% should do it. Cut a slit along the dotted line at B and insert A into the slit, tighten until you have a comfortable fit. Remember, not too tight and not too loose.
Diameter chart showing ring sizes:
RED = the most common sizes for women
Inside Diameter ( mm )
US & Canada
British & Australian
French & Russian
|13.21||2||D||2||41 1/2||13 1/2||1 1/2|
|13.41||2 1/4||D 1/2||-||-||-||-|
|13.61||2 1/2||E||3||42 3/4||13 1/4||2 3/4|
|13.83||2 3/4||E 1/2||-||-||-||-|
|14.15||3 1/8||F 1/2||-||-||-||-|
|14.25||3 1/4||F 3/4||7||-||-||-||-|
|14.36||3 3/8||G||5||45 1/4||-||5 1/4|
|14.45||3 1/2||G 1/4||-||-||14 1/2||-|
|14.56||3 5/8||G 1/2||6||-||-||-|
|14.65||3 3/4||H||8||-||46 1/2||-||6 1/2|
|15.27||4 1/2||I 1/2||10||8||-||15 1/4||-|
|15.40||4 5/8||J||-||49||15 1/2||9|
|15.53||4 3/4||J 1/4||-||-||-||-|
|15.70||5||J 1/2||11||9||-||15 3/4||-|
|15.90||5 1/4||K 1/4||-||-||-||-|
|16.00||5 3/8||K 1/2||10||-||-||-|
|16.10||5 1/2||L||12||-||51 3/4||16||11 3/4|
|16.30||5 3/4||L 1/4||-||-||-||-|
|16.41||5 7/8||L 1/2||-||-||-||-|
|16.51||6||M||13||12||52 3/4||16 1/2||12 3/4|
|16.71||6 1/4||M 1/2||14||-||-||-||-|
|17.13||6 3/4||N 1/2||15||-||-||-||-|
|17.35||7||O||16||14||55 1/4||17 1/4||15 1/4|
|17.45||7 1/4||O 1/2||-||-||-||-|
|17.75||7 1/2||P||17||15||56 1/2||17 3/4||16 1/2|
|17.97||7 3/4||P 1/2||-||-||-||-|
|18.18||8||Q||18||16||57 3/4||18||17 3/4|
|18.35||8 1/4||Q 1/2||-||-||-||-|
|18.53||8 1/2||Q 3/4||19||17||-||18 1/2||-|
|18.69||8 3/4||R 1/4||20||-||-||-||-|
|18.80||8 7/8||R 1/2||
|19.10||9 1/8||S||-||60 1/4||-||20 1/4|
|19.22||9 1/4||S 1/4||21||-||-||-||-|
|19.31||9 3/8||S 1/2||-||-||-||-|
|19.41||9 1/2||S 3/4||22||19||-||19 1/2||-|
|19.51||9 5/8||T||-||61 1/2||-||21 1/2|
|19.62||9 3/4||T 1/4||-||-||-||-|
|20.02||10 1/4||U||21||62 3/4||-||22 3/4|
|20.20||10 1/2||U 1/2||24||22||-||20 1/4||-|
|20.32||10 5/8||V||-||63||-||23 3/4|
|20.44||10 3/4||V 1/4||-||-||-||-|
|20.68||11||V 1/2||25||23||-||20 3/4||-|
|20.85||11 1/4||W 1/4||-||-||-||-|
|20.94||11 3/8||W 1/2||-||-||-||-|
|21.08||11 1/2||W 3/4||26||24||-||21||-|
|21.18||11 5/8||X||-||66 1/4||-||26 1/4|
|21.24||11 3/4||X 1/4||-||-||-||-|
|21.30||11 7/8||X 1/2||-||-||-||-|
|21.49||12||Y||27||25||67 1/2||21 1/4||27 1/2|
|21.69||12 1/4||Y 1/2||28||-||-||-||-|
|21.89||12 1/2||Z||29||26||68 3/4||21 3/4||28 3/4|
|22.10||12 3/4||Z + 1/2||-||-||-||-|
|22.33||13||Z + 1||27||-||22||-|
|22.60||13 1/2||Z + 1.5||-||-||-||-|
Z + 2
Z + 2.5
Z + 3
Z + 3.5
Z + 4
Z + 4.5
Z + 5
Z + 6