SIZE GUIDE


1.GEMSTONES, SIZE AND CARATS.

2.CALIBRATED GEMSTONES.

3.RING SIZE.

 

1.GEMSTONES, SIZE AND CARATS.

 

Always Gemstones are described in Milimetres and Carats. For example:

Swiss Blue Topaz, Size 10x8 Milimetres Cushion Cut. Carat 2.73 Carats. Weight 0.59 Grames.

Every gemstone has it's own Specific Weight, for example a Sapphire is 4, and Amethyst is 2.65. Thats mean Sapphire always are heavier than the same size Amethyst.


Typically you can expect an average weight around  0.20 Grs per carat.

Depending on the cut of the gemstone it can look longer or shorter, Marquise cut Topaz for example, 12 x 6 mm, measure around 1.88 carats. The same Topaz gemstone with Square Cushion Cut,  8 x 8 mm, can look smaller and be actually bigger on carats, around 2.70 Cts. Despite the fact of it's appearance, Cushion/Round/Square are typically deeper than a Marquise cut.

Another important fact about cut: Calibrated gemstones are allways well proportioned. For example a Pear Cut Calibrated have 12x8 mm, 14x10 mm, 16x12 mm, always follow the same proportions.  


2.CALIBRATED SIZE GEMSTONES USUAL FOR JEWELRY SETTINGS



ROUND                  TRILLION             SQUARE / PRINCESS                   PEAR     

1.5x1.5                      5x5                              5x5                                     5X3

2.5x2.5                      6x6                              6x6                                     6X4

3x3                            7x7                              7x7                                     7X5

3.5X3.5                      8X8                             8X8                                     8X6

4X4                            9X9                             9X9                                     9X7

5X5                           10X10                        10X10                                   10X7

6X6                           11X11                        11X11                                   12X8

7X7                           12X12                        12X12                                   13X9

8X8                           13X13                        13X13                                   14X9

9X9                           14X14                        14X14                                   15X10

10X10                       15X15                        15X15                                   16X12

11X11                       16X16                        16X16                                   18X13

12X12                       17X17                        17X17                                   20X15


OVAL           RECTANGULAR        CUSHION           MARQUISE

                         EMERALD


5X3                     5X3                     6X4                          4X2

6X4                     6X4                     8X6                         5X2.5

7X5                     7X5                    10X8                         5X3

8X6                     8X6                    11X9                         6X3

9X7                     9X7                    12X10                       7X3.5

10X8                 10X8                    14X10                        8X4

11X9                 11X9                    14x12                       10x5  

12X10               12X10                  16X12                       12X6

14X10               14X12                  16X14                       14X7

14X12               16X12                  18X14                       16X8

16X12               18X13                  18X16                       18X9

18X13               20X15                  20X16                       20X10

20X15               25X18                  22X18                       22X11

                         27X20                  24X18                       24X12

                         



3.RING SIZE


USA                   UK                       SLOVAKIA         UKRANIA          INDIA             SPAIN

CANADA       AUSTRALIA              FRANCE            GERMANY         CHINA            ITALY

                    SOUTH AFRICA                                    RUSSIA            JAPAN      NETHERLANDS


5                       J 1/2                            49                   15 3/4                 9                      9

5 1/4                   K                             49 5/8                   16                                          9 5/8

5 1/2                 K 1/2                         50 1/4                16 1/4                10                  10 1/4

5 3/4                    L                            50 7/8                                          11                  10 7/8

6                       L 1/2                         51 1/2                16 1/2                12                  11 1/2

6 1/4                   M                            52 1/8                16 3/4                                      12 1/8

6 1/2                M 1/2                         52 3/4                   17                    13                 12 3/4

6 3/4                   N                            53 3/8                                                                13 3/8

7                         O                               54                    17 1/4                 14                   14

7 1/4               O 1/2                           54 5/8                 17 1/2                                    14 5/8

7 1/2                  P                              55 1/4                 17 3/4                 15               15 1/4

7 3/4               P 1/2                           55 7/8                    18                                       15 7/8

8                       Q                              56 1/2                                            16               16 1/2

8 1/4              Q 1/2                            57 1/8                 18 1/4                                    17 1/8

8 1/2                 R                               57 3/4                 18 1/2                 17               17 3/4

8 3/4              R 1/2                            58 3/8                 18 3/4                                                    

9                       S                                 59                        19                    18                   19


 


Diseño: Liderkuota