This guide shows you how to cut wedding cake tiiers into pieces approximately 1" x 2" x 4".  First, remove the top tier and begin cutting the second tier.(The top tier is usually saved for the first year anniversary).

For round cakes, move in two inches from the tier's outer edge: cut a circle and then slice 1" pieces within the circle. Now move in another 2", cut another circle, slice 1" pieces and so on until the tier is completely cut.  The center core can be cut into 3rds, 4ths, and 6ths depending on the size.

For square cakes, move in 2" from the outer edge and cut across. Then slice 1" pieces of cake. Move in another 2", and slice again until the entire cake is cut.
How to cut a wedding cake...
Number of servings per tier.
Round Tiers            6"    12
         8"           24
       10"    38
       12"    56
       14"    78
       16"  100



Square Tiers            6"   18
         8"          32
       10"   50
       12"   72
       14"   98
       16" 128