My first topsy turvy cake! 10" bottom (3 layers) and 6" top (3 layers). Buttercream frosting with fondant accents; the family doesn't like fondant all over the cake. Didn't taper the sides of the cake as much as I probably should have, but I wimped out! Overall, very happy with it. Was tricky getting the top layer in and out of the bottom layer without getting buttercream all over my fingers/spatula. Will have to work on that next time!