Adjust Casio Model 3091 watch band - Casio G-Shock G7000D-8V Wrist Watch

SOURCE: casio pathfinder SPF 70-s titanium band adjustment

The schlatter.org solution is for the other type of casio band I've run into.

The wristband with the arrows has a fine pictorial solution at http://www.wikihow.com/Adjust-a-Casio-S-935L-Watch-Band

Basically you use a very very fine poker to poke the pins out in the direction of the arrows.

NOTE: you can't poke them out if you will drive them into your work surface, so think about that before you start.

SOURCE: Casio watch

Press MODE until you reach H-S (e.g. A 11:00 with seconds on top)

Press and hold ADJUST for 3 seconds until H-S blinks

Press and hold SEARCH for every movement; you may wanna press LIGHT so the hands will move freely. Press ADJUST again to when desired time was reached

SOURCE: adjust expandable watch bands- Timex watch

Most expandable watch bands aren't sizable. IF it is sizable you will be able to tell when you stretch the bracelet out. If it looks like you can unlatch the links when you stretch it out then you might be in luck, but like I said, most are not sizable.

SOURCE: how to adjust metal wrist band on casio watch?

1. Pop out one spring pin to disconnect the band from the watch or from itself at the clasp. If you don't have a special tool for this, a needle or a pin will probably work. A straightened paper clip may be too thick, but they are cheap so you could try it. Now the watch and band can sit flat on the work table.
2. Examine the links. If some of them have little arrows on them (usually the ones closest to both sides of the clasp), they are removable.
3. These removable links are held together by a "U" shaped (actually a squared off "U" - sort of like this |_| ) pin that is inserted into the link. There may should be some kind of window-like opening in the link into which you can insert a narrow screwdriver or similar tool or even a small nail (around 6-penny size) and push out the |_| shaped pin. A straightened paper clip is probably not sturdy enough, but you could try it. Push in the direction of the arrow (from tail to point). The links that were joined by the |_| pin can now be separated.
   
4. Remove a second such pin from another adjacent link. Now a single link is free and can be discarded (or kept). Reconnect the remaining adjustable links with one of the |_| pins and re-attach the spring pin from step 1 so the band is reunited with itself or with the watch.
5. Try it on. If it is still too long, repeat the process. Good luck.
   

SOURCE: Casio watch

in time keeper mode (press lower left button 6 times) then hold down the top left button until the current digital timer starts blinking then hold down the lower right hand button until you see the minute hand start moving if you got a long way to go like more than 2 hours of adjusting press and hold the top right button and the bottom right button and the minute hand will move automatically. to stop the movement push the bottom right button and pressing this bottom right button advances the minute hand 20 seconds .. at a tick.

I hope this helps