I am making my step daughters wedding cake - I need at least 6 six cakes (including the "topper") to feed 150 people. the cake isn't tiered but rather each cake is placed on top of a glass vase. Help?

wilton has a serving chart that will show you how many servings you'll get per cake. I believe it's on their website.

http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm

Are these cakes to be the centerpieces on each table? If so, how many people per table? The link above brings you right to the wilton chart.

6, 8, 10, and two 10" on the side...if you are going with satellites.

My peacock cake setup was what I just described...kinda neat to have two cakes flanking the main one..and this was exactly 150 servings.

Oh sorry...there I go, not reading the entire post. Ok....so each cake on it's own vase. Simple: Three 10" square...or four 10" rounds.