Sizing Chart & FAQs

Ring Sizing Chart

Determining your ring size can be tricky without the proper tools. Use our chart below to find your ring size in different countries.

Ring Diameter (MM) Ring Circumference (MM) USA/Canada United Kingdom France Germany Japan Switzerland
14 44 3 F 44 14 4 4
14.4 45.2 G 45¼ 14½ 6⅓
14.8 46.5 4 46½ 15 7
15.2 47.8 47¾ 15¼ 8 8
15.6 49 5 49 15¾ 9
16 50.3 L 50¾ 16 10½ 10¾
16.5 51.8 6 M 51½ 16½ 12 12¾
16.9 53.1 N 52¾ 17 13 14
17.3 54.3 7 O 54 17¼ 14 15¼
17.7 55.6 P 55¼ 17¾ 15 16½
18.2 57.2 8 Q 56¾ 18 16 17¾
18.6 58.4 58 18½ 17 18½
19 59.7 9 59¼ 19 18 20
19.4 60.9 60¾ 19½ 19 21
19.8 62.2 10 61¾ 20 20 21¾
20.2 63.5 10½ 62¾ 20¼ 22 22¾
20.6 64.7 11 64¼ 20¾ 23 24
21 66 11½ 66 21 24 25¾
21.4 67.2 12 Y 67¼ 21¼ 25 27½
21.8 68.5 12½ Z 68 21¾ 26 28¾
22.2 69.7 13 Z + 1 69 22 27 29¼
22.6 71 13½ Z + 1.5 71 22.6 - 31

 

Frequently Asked Questions

How do I measure my ring size?

Watch this short video clip and compare the circumference of your finger against our size chart. Make sure you're choosing a size where the circumference of the ring is at least as big as the circumference of your finger. 

What's the difference between 10K, 14K and 18K gold?

These are a measure of the purity of the gold used in creating jewelry, where the 'K' stands for 'Karat'. Gold is a very soft and malleable metal, so jewelry made out of 100% pure gold would get scratched, dinged and dented very easily. So, jewellers mix together other metals including palladium, silver, nickel, copper and zinc to create a gold alloy. The result is an alloy that is much more durable and more practical for use in jewelry. The number before the 'K' represents how many parts, out of 24 total parts, of the alloy are gold. 18K gold will be an alloy made from 18 parts gold and 6 parts other metals. 10K, 14K and 18K gold are the most common alloys used in jewelry.

What's the difference between yellow gold, white gold and rose gold?

Pure gold is naturally yellow in color and yellow gold alloys are the most common color of gold found in jewelry. Depending on which metals are used in the alloy and in what proportion they're used, jewellers can create different colored alloys; this is how we get white gold and rose gold. The actual amount of gold used in different colored alloys will remain the same, as long as they are the same karat, only the other metals in the allow will differ between yellow, white and rose gold.

After a while, my white gold jewelry appears to have lost its luster, what happened?

White gold jewelry is often plated with rhodium, another precious metal, to give it that desirable bright, white, shiny color. Over time, with regular use, this rhodium plating can wear thin and the pale yellow undertones of the gold's natural color can begin to appear. White gold jewelry can often be easily replated in rhodium by a jeweller in order to restore its bright white finish.

Is it normal to feel skin irritation from wearing my white gold jewelry?

The nickel used in some white gold alloys can cause an allergic reaction when worn over long periods. This reaction, typically a minor skin rash from nickel dermatitis, occurs in about one out of eight people. It isn't contagious or life-threatening, but it can be very uncomfortable. Contact your healthcare professional for more information.

What is gold plated jewelry?

Gold plating is a method of depositing a thin layer of gold onto the surface of another metal, most often copper or silver, by a chemical process. Gold plated jewelry is designed to look like real solid gold jewelry, but made from cheaper, inferior quality materials.

Does Blackstone Jewellers sell gold plated jewelry?

None of our jewelry is plated in gold; every piece is entirely made from solid gold in either 10K, 14K or 18K. Our jewelry will never lose its colour, tarnish, or give you a rash, and it can always be repaired by an experienced jeweller using the same gold alloy since it is never plated or dipped to appear as gold.