the new casio protrek model prg 100 is the smallest protrek watch in dimensions yet,so i guess it will be the best option for those people who have smaller wrists...looking at this watch,s dimensions i think that this protrek is same size as most mid sized g shock watches,so over all this watch is just about the size of average normal watch you wear .
its dimensions are
PRG-100 = 52.9 (H) x 46.5 (W) x 14.0 (DEPTH) mm / WEIGHT IS 51 g
the pictures are given below
also this watch has 24 hour count down timer and 24 hour stop watch,plus 5 alarms.plus its a tough solar with auto light etc.