2 16 inch squares for bottom layers and 10 in rounds for top. I used the Wilton castle set. The cones were covered in royal icing then quickly rolled in pink sprinkles. Cakes are covered in buttercream. This was my first castle cake and I wish the castle set was easier to work with. I think the towers should have been made to sink into the cake so it would be easier to make them stand up straight. Can I have an "Amen"!