1) cobble Stone (http://g603.net)
5*5*5cm, 7*7*7cm, 9*9*8cm, 10*10*10cm, 15*15*15cm ...
2) mesh paver
regular pattern; irregular pattern
3) palisade
12*12*30--150cm; 10*25*40--200cm; 8*20*50/100cm ...