i have an order to do this cake in 3 weeks i have never done a big square cake like this so i have no idea what size pans i would need to get for this. the bride is expecting 300 + people so it would need to feed that many can someone please help me..... here is the picture of the cake

Here's a link that shows serving guide for wedding cakes:

Cake Baking, Cutting & Serving Guide - 2 in. Deep Pans:

http://www.cakecentral.com/article14-Cake-Baking-Cutting--Serving-Guide---2-in-Deep-Pans.html

There's also one for 3 in Deep but I believe the norm is a usually 2 -2" layers.


Cake Baking, Cutting & Serving Guide - 3 in. Deep Pans

http://www.cakecentral.com/article15-Cake-Baking-Cutting--Serving-Guide---3-in-Deep-Pans.html

HTH!