i want to make a wedding cake but dont know the servings...i have wilton square pans...is the wilton wedding serving guide an accurate thing to follow to figure out serving count?

The wilton serving guide is the standard, though there are others.

A standard serving size is 1x2x4 inches or 2x2x2 inches = 8 cubic inches of cake.
http://cateritsimple.blogspot.com/search/label/cake%20comb

Earlene also has this available: http://www.earlenescakes.com/ckserchart.htm

but its much bigger servings than the Wilton (so more cake, same price). Wilton is pretty much the norm and I go with that.

indy - is there just a picture of the way you cut the cake that is easy to print out?

Thank you, I never thought of just saving that picture.