These are the three things you need to shorten a flip lock bracelet.
Push out the pin that connects the bracelet to the watch in the direction of the arrow.
Pull out the pin on the other side.
Measure how many links you have to take out to make the watch fit your wrist.
Select the link you would like to take out.
Push out the split-pin in the direction of the arrow on the back side of the bracelet.
Pull out the split-pin on the other side of the bracelet.
The bracelet is now divined in two parts
Repeat steps 5, 6 and 7 to remove the links you want.
When you have removed the links you would like to take out, put the remaining strap together, en put back the split-pin in opposite direction the arrow on the bracelet points to.
Push in the split-pin.
Get the big pin and mound the end of the bracelet to the watch head.
Push the pin back in.
You have now shortened your own flip lock bracelet