Sizing:

Measuring your size for both rings and bracelets is as simple as taking a string or flexible material and wrap it around your wrist or intended finger for wear (make sure to measure just blow the knuckle for ring sizes).  Cut the string where it connects around the radius and measure it using a ruler or tape measure.  Cuff bracelets are intended to be somewhat loose rather than tight against the skin, these corresponding numbers reflect that intention for the most comfortable wear.

Corresponding Sizes:

Ring Size    Inches           mm
4                 1-13/16         46.5
4 ½             1-7/8             47.8
5                 1-15/16         49
5 ½              2                  50.3
6                  2-1/16          51.5
6 ½              2-1/8            52.8
7                  2-3/16          54
7 ½              2-1/4            55.3
8                  2-5/16          56.6
8 ½              2-3/8            57.6
9                  2-7/16          59.1
9 ½              2-1/2            60.3
10                2-9/16          61.6
10 ½            2-5/8            62.8

Bracelet Size / Inches
Size 1 = 5 1/2 - 5 3/4
Size 2 = 5 13/16 - 6 1/4
Size 3 = 6 5/16 - 6 9/16
Size 4 = 6 5/8 - 7
Size 5 = 7 1/16 - 7 3/8
Size 6 = 7 7/16 - 7 3/4