I made the blade a few weeks before with fondant but where I have the dotted lines, I made the length of those pieces much longer so I could feed them into the cake for stability. I did not want to put wires in there. After I have put the blade in, I used royal icing underneath just to hold it in place. The cake size was a 9" square but I am sure you could resize the picture to suit any cake tin size - I have put a photo of the cake also. if you have any questions, don't hesitate to contact me.