I know...I know...prices are based on the cost of the materials and the local market.

I'm actually wondering what size is a "slice" of cake? And how do you count slices in a crazy 3-D cake (like one shaped like a cat?)

No real reason. I'm just wondering.

I go by the wilton chart..I know others go by different ones.

Their wedding cakes are a 1" x 2" slice of cake.

Party cakes are 1 1/2" x 2", I believe.

Industry standard for a slice in North America is 1"x2"x4".

Some choose to go larger, and in some areas, like Australia, they are smaller, 1"x1"x4" I believe.

Everyone has a different system when it comes to 3D carved cakes, mine have very little to do with serving size.

I did forget to add that when doing a carved cake, I charge per slice of the cake BEFORE any was cut away at a lightly reduced rate since in order to carve, it didn't need to be iced smoothly and look perfect. 

You have to take a really educated guess at how much you are carving out and how much you are leaving there to determine the servings.  You can sort of measure and divide by the size of the servings.  A bit o' math for ya!

Of course, a carved cake is so much more work and you end up adding on hrs and hrs of labor.  Therefore, they end up being much more than a regular cake for less servings.