DIAMOND RING SIZE CHART

INDIA Size	Diameter in mm	Circumference in mm	USA, Canada	UK, Australia, New Zealand
1	13.0	13.0	1	B
2	13.4	13.4	2	D
3	13.7	13.7	2.5	E
4	14.0	14.0	3	F
5	14.3	14.3	3.5	G
6	14.6	14.6	3.75	G ½
7	15.0	15.0	4	H ½
8	15.3	15.3	4.5	I ½
9	15.6	15.6	5	J ½
10	15.9	15.9	5.5	K ½
11	16.2	16.2	5.75	L
12	16.5	16.5	6	L ½
13	16.8	16.8	6.5	M ½
14	17.2	17.2	7	O
15	17.5	17.5	7.5	P
16	17.8	17.8	8	Q
17	18.1	18.1	8.5	R
18	18.4	18.4	9	S
19	18.8	18.8	9.5	-
20	19.1	19.1	10	T ½
21	19.4	19.4	10.25	U
22	19.7	19.7	10.5	U ½

Diamond rings are typically available in a range of sizes, which refers to the diameter of the ring's band as well as the size of the diamond or other gemstone that is set in the ring. The size of the diamond or other gemstone is usually measured in carats, with one carat being equal to 0.2 grams. The size of the ring's band is typically measured in millimeters, with common sizes ranging from around 4 to 9 millimeters.

When it comes to choosing the size of a diamond ring, there are a few factors to consider. One important factor is the size of your finger. It's important to choose a ring that fits comfortably on your finger without being too loose or too tight. You can measure your finger size at home using a piece of string or a strip of paper, or you can visit a jeweler to have your finger sized professionally.

Another factor to consider when choosing the size of a diamond ring is the style and design of the ring. Some diamond rings have a larger, more ornate setting that may require a larger diamond to balance out the overall design. On the other hand, a simple, minimalistic ring may look best with a smaller diamond or no diamond at all.

Ultimately, the size of a diamond ring is a matter of personal preference and depends on the wearer's style, budget, and finger size.