6 inch = 15.2cm
6.5 inch = 16.5cm
7 inch = 17.8cm
7.5 inch = 19cm 

If you're unsure about your bracelet size, you can measure your wrist using a tape measure, a piece of string, or a thin strip of paper.

Wrap it around your wrist where you intend to wear the bracelet, mark where the ends meet, and then measure the length up to the mark in inches.

Ensure there is a slight gap between the string or paper and your skin, enough to fit a finger.