Ok, my bride decided she wants a hexagon wedding cake, and since the pans are super expensive to buy, I found a post about turning a square cake into a hexagon. I'm going to try that, but was wondering... what size would the hexagons be? What size square pans would I need to make a 12, 10, and 8" cake?

Well, my 8" hex pan measures 8" from the farthest corners (if that makes sense) it measures 7" from flat side to flat side. So I think you would use the same size in square pans if that was the dimensions she was wanting....HOWEVER, did you determine your serving using the guide for hex pans or for squares?

If you used the guides for square cakes, which feed more than any other dimensional shape (i.e. round, hearts, etc.) then you would need to actually make larger tiers to account for the cut-away. Does that make sense?