After talking with Cali4dawn, this is a quote from her (with her permission) on the sheet cake size question:
"1/4 sheet - 9*13
1/2 sheet - (2) 9*13's equaling 18*13
whole sheet - (4) 9*13's equaling 26*18
When I make the whole sheet, I have to shave off just about 1 inch of the cake (on one 26" side and one 18" side) to fit on a standard whole sheet cake board (it fits, but no room for borders). I do this after torting and filling but before icing. This brings the cake down to 25*17 (and provides taste testing samples for me!!). If I make my own board out of plywood, I do not shave it off, I just make the board big enough.
In doing it this way, I have eliminated the need to purchase more pans (I own 2 identical 9*13's and have baked and sold many whole size and half size cakes this way). I also have less pans to store and in the end less hassle for me."
This is what I've been using, as have several others here on CC, although I have never made a full sheet cake, but it does simplify some of the cake pan dilemma. Janice
"1/4 sheet - 9*13
1/2 sheet - (2) 9*13's equaling 18*13
whole sheet - (4) 9*13's equaling 26*18
When I make the whole sheet, I have to shave off just about 1 inch of the cake (on one 26" side and one 18" side) to fit on a standard whole sheet cake board (it fits, but no room for borders). I do this after torting and filling but before icing. This brings the cake down to 25*17 (and provides taste testing samples for me!!). If I make my own board out of plywood, I do not shave it off, I just make the board big enough.
In doing it this way, I have eliminated the need to purchase more pans (I own 2 identical 9*13's and have baked and sold many whole size and half size cakes this way). I also have less pans to store and in the end less hassle for me."
This is what I've been using, as have several others here on CC, although I have never made a full sheet cake, but it does simplify some of the cake pan dilemma. Janice








