Size Bracelet by adding or removing links
The 300m Diver utilizes Pin and Collar mechanism to lock the links in place.
Look on the back side of the bracelet. You will see an arrow pointing the direction to push pin through collar.
Using your tool of choice, push the pin in the direction the arrow is pointing and pull the pin all the way out from the opposite direction. It may be necessary to use flat pliers to finishing pulling the pin from the collar.
Remove as many or add as many necessary to achieve your desired fit. You may need to use the micro adjustments to achieve perfect fit.
Micro adjustments utilize spring bar. Just push in on both sides of clasp and move to one of three places.