Conversion charts / How do I measure body jewelry?

16g                                     1.2mm                                                        

14g                                     1.5mm

12g                                     2mm

10g                                     2.5mm

8g                                       3mm

6g                                       4mm

4g                                       5mm  

2g                                       6.5mm

0g                                       8mm

00g                                     9-10mm

                                           11mm                               7/16"

                                           12.7mm                            1/2"

                                           14mm                               9/16"

                                           16mm                               5/8"

                                           19mm                               3/4"

                                           22mm                               7/8"

                                           25.4mm                             1"

                                           27mm                                1-1/16"

                                           28mm                                1-1/8"

                                           32mm                                1-1/4"

                                           34.5mm                             1-3/8"

                                           38mm                                1-1/2"

                                           39.5mm                             1-9/16"

                                           41mm                                1-5/8"

                                           44mm                                1-3/4"

                                           48mm                                1-7/8"

                                           51mm                                 2"