I have this but I am at work and wont be able to get home for a few more hours. I will bring it back and let you know. Maybe in the mean time someone else will chime in with it. Sorry, wish I was at my home right now.
This cake is from the "A Romantic Portfolio" book. It consist of 6,8,10,and 14 inch/2 layer cakes. All top tiers are 6". The whole cake serves 274, minus top tier, Wilton count. I've made this same cake a few years ago.
I have this book.
Sizes used says:
2-layer (4 inches high) Rounds - five 6 inch cakes, three 8 inch cakes, two 10 inch cakes and one 14 inch cake. It gives an exact break down of what cakes are where if you need that too, let me know.
5 in Grecian Pillars (3 packs needed)
13 3/4 in Roman Columns (4 needed)
Using a toothpick and a ruler, mark three rows at 1in and then using tip #80, pipe a shell motion. They used tip #26 for the bottom shell border and a reverse shell for the top.
Let me know if you need anything else.