Sizes

Ring Guide Chart

1.Measure your ring size with a finger strip chart

Attention! Please noted that you should ensure your hand size before you order the rings. If you are not sure of your hand size, you can use our "finger size” guide chart. If you are helping your friends buying, you only have to tell him or her
using a measuring tape to measure the length of finger according to step 1 & 2. then you can use the "Ring Size Table " to compare with the relevant size matching the length. If you can’t find the same size of the matching length, the size of the order you usually make will increase, so the rings wouldn’t be too small when you wear them.

Step 1: Cut a straight piece of paper, the size is approximately 3 inches (length) *1/2 inches (width).
Step 2: Use a piece of paper to cover around your finger, and make the mark on the end of the paper.

Step 3: Draw X mark on the finger size guide chart, then print it out, stretch this note, mark "X" on the terminal of this note, this is just the right finger size. Please click there to use a US Letter print a ruler.

Note something special
About our different measuring standard “Ring guide chart” , comes from the International size conversion table



Ring guide chart

2.Determine your ring size with an existing ring

Use a ring that fits you to determine your ring size. Place your ring over the nearest size circle. The inner edge of the ring should align with the outer edge of the circle. If your ring appears to fit between two sizes, buy the larger size.



ring size

International Ring Size Chart

Please use the chart below for your reference. AlamodeOnline.com uses the standard U.S. ring size, for more accurate sizing please purchase our ring sizer accessory for your customers. Please use our SELL FAQ for the most popular sizes.

AlamodeOnline.com carries US ring sizes: 5, 6, 7, 8, 9, 10, 11, 12, 13
Women's sizes: 5-10
Men's sizes: 8-13 (Limited availability in sizes: 3, 4&14)

We do not carry half sizes. See below for details:

​

Inside

Diameter

Inside

Circumference

Ring Size
mm inches mm inches US
Canada
UK
Australia
Ireland
Japan Switzerland Germany France
11.6 0.458 36.5 1.438
  0     
11.8 0.466 37.2 1.463
      ¼
12.0 0.474 37.8 1.488
      ½
A     
12.2 0.482 38.4 1.513
      ¾
A ½
12.4 0.490 39.1 1.539
1   
B     
  1
12.6 0.498 39.7 1.564
  1 ¼
B ½
12.9 0.506 40.4 1.589
  1 ½
C     
12 ¾
40 ½
13.1 0.514 41.0 1.614
  1 ¾
C ½
13.3 0.522 41.6 1.639
  2     
D     
  2
  1.50
13 ¼
41 ½
13.5 0.530 42.3 1.664
  2 ¼
D ½
13.7 0.538 42.9 1.689
  2 ½
E     
  3
  2.75
13 ¾
42 ¾
13.9 0.546 43.5 1.714
  2 ¾
E ½
14.1 0.554 44.2 1.740
  3     
F     
  4
  4.00
14     
44     
14.3 0.562 44.8 1.765
  3 ¼
F ½
  5
  5.25
14.5 0.570 45.5 1.790
  3 ½
G     
14 ½
45 ¼
14.7 0.578 46.1 1.815
  3 ¾
G ½
  6
  6.50
14.9 0.586 46.7 1.840
  4     
H     
  7
15.1 0.594 47.4 1.865
  4 ¼
H ½
  7.75
15     
46 ½
15.3 0.602 48.0 1.890
  4 ½
I     
  8
15.5 0.610 48.7 1.915
  4 ¾
J     
  9.00
15.7 0.618 49.3 1.941
  5     
J ½
  9
15 ¾
49     
15.9 0.626 49.9 1.966
  5 ¼
K     
10.00
16.1 0.634 50.6 1.991
  5 ½
K ½
10
16.3 0.642 51.2 2.016
  5 ¾
L     
11.75
16     
51 ¼
16.5 0.650 51.8 2.041
  6     
L ½
11
12.75
16.7 0.658 52.5 2.066
  6 ¼
M     
12
16 ½
51 ½
16.9 0.666 53.1 2.091
  6 ½
M ½
13
14.00
17.1 0.674 53.8 2.116
  6 ¾
N     
17     
52 ¾
17.3 0.682 54.4 2.141
  7     
N ½
14
15.25
17 ¼
54     
17.5 0.690 55.0 2.167
  7 ¼
O     
17.7 0.698 55.7 2.192
  7 ½
O ½
15
16.50
17 ½
55 ½
17.9 0.706 56.3 2.217
  7 ¾
P     
18.1 0.714 56.9 2.242
   8      
P ½
16
17.75
18     
56 ¾
18.3 0.722 57.6 2.267
  8 ¼
Q     
18.5 0.730 58.2 2.292
  8 ½
Q ½
17
18 ½
58     
18.7 0.738 58.9 2.317
  8 ¾
R     
19.00
18.9 0.746 59.5 2.342
  9     
R ½
18
19     
59 ½
19.2 0.754 60.1 2.368
  9 ¼
S     
20.25
19.4 0.762 60.8 2.393
  9 ½
S ½
19
19 ½
60 ¼
19.6 0.770 61.4 2.418
  9 ¾
T     
21.50
19.8 0.778 62.1 2.443
10     
T ½
20
20     
61 ¼
20.0 0.786 62.7 2.468
10 ¼
U     
21
20.2 0.794 63.3 2.493
10 ½
U ½
22
22.75
20 ¼
62 ¾
20.4 0.802 64.0 2.518
10 ¾
V     
20.6 0.810 64.6 2.543
11     
V ½
23
20 ¾
64 ¼
20.8 0.818 65.2 2.569
11 ¼
W     
25.00
21.0 0.826 65.9 2.594
11 ½
W ½
24
21     
66     
21.2 0.834 66.5 2.619
11 ¾
X     
21.4 0.842 67.2 2.644
12     
X ½
25
27.50
21.6 0.850 67.8 2.669
12 ¼
Y     
21 ¾
67 ¼
21.8 0.858 68.4 2.694
12 ½
Z     
26
28.75
22.0 0.866 69.1 2.719
12 ¾
Z ½
22     
22.2 0.874 69.7 2.744
13     
27
22.4 0.882 70.3 2.769
13 ¼
Z  1
22.6 0.890 71.0 2.795
13 ½
22.8 0.898 71.6 2.820
13 ¾
Z  2
23.0 0.906 72.3 2.845
14     
Z  3
23.2 0.914 72.9 2.870
14 ¼
23.4 0.922 73.5 2.895
14 ½
Z  4
23.6 0.930 74.2 2.920
14 ¾
23.8 0.938 74.8 2.945
15     
24.0 0.946 75.4 2.970
15 ¼
24.2 0.954 76.1 2.996
15 ½
24.4 0.962 76.7 3.021
15 ¾
24.6 0.970 77.4 3.046
16     

 

International Size Conversion Table

Millimeter / Inch Conversion Chart

  1. To convert millimeters to inches , multiply the mm dimension by .03937.
  2. To convert inches to millimeters , multiply the mm dimension (in decimal form) by 25.4.
  3. If your number is a fraction, divide the numerator by the denominatior to reach the decimal form.
International Size Conversion
 
mm inch
2 .0787"
3 .1181"
4 .1575"
5 .1968"
6 .2362"
7 .2756"
8 .3150"
9 .3543"
10 .3973"
11 .4331"
12 .4724"

 

Necklace Length Reference Chart

Gender Size
Women's #16 #18 #20 #24 #30 #36
Men's #18 #20 #24
Necklace Length Reference

 

Converting From Size To Carat - CZ

Pear Shape

Size(mm) CZ(ct) Diamond(ct)
  5.0 x   3.0
  0.40
  0.24
  6.0 x   4.0
  0.68
  0.40
  7.0 x   5.0
  1.20
  0.71
  8.0 x   5.0
  1.40
  0.82
  8.5 x   5.5
  1.70
  1.00
  9.0 x   6.0
  2.15
  1.26
10.0 x   7.0
  3.20
  1.88
12.0 x   8.0
  5.00
  2.94
14.0 x   9.0
  7.50
  4.41
15.0 x 10.0
  9.00
  5.29
18.0 x 11.0
16.00
  9.41
19.0 x 12.0
17.00
10.00
23.0 x 14.0
26.00
15.29

Rectangle Shape

Size(mm) CZ(ct) Diamond(ct)
  5.0 x   3.0
  0.40
  0.24
  6.0 x   4.0
  0.68
  0.40
  6.5 x   4.5
  1.20
  0.71
  7.0 x   5.0
  1.40
  0.82
  8.0 x   6.0
  1.70
  1.00
  8.5 x   6.5
  2.15
  1.26
  9.0 x   7.0
  3.20
  1.88
  9.5 x   7.5
  5.00
  2.94
10.0 x   8.0
  7.50
  4.41
11.0 x   9.0
  9.00
  5.29
12.0 x 10.0
16.00
  9.41
14.0 x 12.0
17.00
10.00
13.0 x 12.0
26.00
15.29
18.0 x 13.0
28.48
16.75
20.0 x 15.0
45.77
16.92

Oval Shape

Size(mm) CZ(ct) Diamond(ct)
  5.0 x   3.0
  0.35
  0.21
  6.0 x   4.0
  0.75
  0.44
  7.0 x   5.0
  1.40
  0.82
  7.5 x   5.5
  1.70
  1.00
  8.0 x   6.0
  2.10
  1.24
  9.0 x   7.0
  3.20
  1.80
10.0 x   8.0
  4.60
  2.71
10.5 x   8.0
  4.90
  2.88
11.0 x   9.0
  6.20
  3.64
12.0 x 10.0
  7.70
  4.52
14.0 x 12.0
12.52
  7.36
16.0 x 12.0
17.41
10.24
18.0 x 13.0
19.40
11.41
20.0 x 15.0
19.64
17.43

Heart Shape

Size(mm) CZ(ct) Diamond(ct)
  4.0 x   4.0
  0.50
0.29
  5.0 x   5.0
  0.75
0.44
  6.0 x   6.0
  1.30
0.76
  6.5 x   6.5
  1.65
0.97
  7.0 x   7.0
  2.10
1.24
  8.0 x   8.0
  3.10
1.82
  9.0 x   9.0
  4.40
2.59
10.0 x 10.0
  4.00
3.53
11.0 x 11.0
  8.00
4.70
12.0 x 12.0
10.40
6.12
13.0 x 13.0
14.94
8.79
14.0 x 14.0
15.70
9.24

Round Shape

Size(mm) CZ(ct) Diamond(ct)
  1.25
  0.013
  0.010
  1.50
  0.023
  0.015
  1.75
  0.037
  0.020
  2.00
  0.060
  0.030
  2.25
  0.080
  0.040
  2.50
  0.100
  0.050
  2.75
  0.150
  0.060
  3.00
  0.200
  0.100
  3.25
  0.250
  0.130
  3.50
  0.300
  0.160
  3.75
  0.350
  0.200
  4.00
  0.430
  0.250
  4.25
  0.520
  0.300
  4.60
  0.620
  0.360
  4.75
  0.720
  0.420
  5.00
  0.620
  0.480
  5.25
  0.980
  0.580
  5.50
  1.100
  0.650
  5.75
  1.270
  0.750
  6.00
  1.450
  0.850
  6.25
  1.650
  0.970
  6.50
  1.850
  1.090
  6.75
  2.050
  1.200
  7.00
  2.300
  1.350
  7.50
  2.800
  1.650
  8.00
  3.350
  1.970
  8.50
  4.000
  2.350
  9.00
  4.700
  2.760
  9.50
  5.500
  3.740
10.00
  6.400
  3.760
11.00
  8.500
  5.000
12.00
11.000
  6.470
13.00
13.900
  6.180
14.00
17.400
10.240
15.00
21.000
12.350
16.00
25.300
14.880
17.00
30.000
17.540
18.00
35.300
20.760
19.00
43.590
25.640
20.00
52.000
30.630

Marquise

Size(mm) CZ(ct) Diamond(ct)
  4.0 x   2.0
  0.15
  0.08
  5.0 x   2.5
  0.24
  0.14
  6.0 x   3.0
  0.42
  0.25
  7.0 x   3.0
  0.57
  0.34
  8.0 x   4.0
  0.90
  0.53
  9.0 x   4.5
  1.15
  0.73
10.0 x   5.0
  1.70
  1.00
11.0 x   5.5
  2.25
  1.32
12.0 x   6.0
  2.85
  1.66
13.0 x   6.5
  3.60
  2.11
14.0 x   7.0
  4.50
  2.65
15.0 x   7.5
  3.50
  3.23
18.0 x   8.0
  7.50
  4.41
17.0 x   8.5
  8.30
  4.88
20.0 x 10.0
13.00
  7.63
22.0 x 11.0
16.50
  9.71
30.0 x 15.0
36.50
21.00

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