How many people can I serve with a four tiered round wedding cake, the bottom round is 14 x 3 high and gradually goes down two inches per tier. Each tier is 6 inches thick.

Here is the wilton serving guide for wedding cakes for 3 in. pans:

http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-3-inch-pans.cfm


Here is the serving guide for earlenes (slightly larger slices):

http://www.earlenescakes.com/ckserchart.htm

HTH!

If each 6" tall tier will be cut into 1" x 2" x 6" servings, the chart suggestions are accurate (although 6" tall slices won't fit on dessert-sized plates).

If each 6" tall tier has a board in the middle at 3" and will be cut into 1" x 2" x 3" servings, they would serve double what the charts indicate.

Here, just punch in your pan sizes and it will give you all you need!!!

http://shinymetalobjects.net/cake/calculator/cakulator.cgi?pan=Round%2C+6%22&pan=Round%2C+9%22&option=2&option=Select+Cakulator&chart=wiltonWedding2Inch&chart=Select+Chart&.defaults=Reset&.cgifields=pan