Material : resinDimension: 7.08"x4.33"x3.54"(LxWxH); 18*11*9cm.The stone hole size: 2.08"x1.49"(LxH); 5*4cm.Please check about the size before purchasing.This fish tank decoration creates a mossrockery landscape view look in your fish tank enhance visual appeal and provide shelter for your fish.