HOW TO MEASURE YOUR WRIST?
Measure with a measuring tape to a size you want. Leave some space to ensure that its not be to tight.
Or measure with a tread or ribbon and measure the lenght you come up with, on a ruler afterwards.
HOW TO TAKE CARE OF YOUR BRACELET
As with all jewelry it should not be worn when exercising.
And it should be hold away from water an cleaning agents.