Here are simple instructions on how to measure your wrist: 

STEP 1: Measure your wrist with a flexible measuring tape. If you don't have a flexible measuring tape a strip of paper work. Wrap the measuring tool snugly around your wrist where you would normally wear the bracelet.

STEP 2: If you are using a strip of paper mark your size with a pen or pencil. Then use a ruler to measure the length. This would be your actual wrist size.

STEP 3: Decide on what type of fit you want. Do you prefer a snug fit or a loose comfortable fit? 

For a snug fit add 1/4" - 1/2" and for a bit more room 1/2" - 1". This would be your bracelet size.