The bottom (pc) is a 9"X13" cake, and the top (monitor) is three 8" square layers. All chocolate covered in fondant. All pieces are made out of fondant, as well. Sorry, this is not the best picture, as the wax from the birthday candles had already melted onto the cake in some parts. The kids at party all thought the cake was pretty cool, but maybe a bit small to be a computer!