I would really appreciate it if y'all would discuss or link me to info on sheet cake sizes. I have 9x13 for a 1/4 sheet and a 13x18"(?) for 1/2 sheet and normally use 2 of those for a full sheet.....but that's a problem when shopping for boards and boxes and really haven't needed to do one for more than a year. Now it's come up a couple of times in the last week, I just wonder ....it seems that bakeries are using a smaller size for a full sheet...will start calling and checking tomorrow but wanted to get some solid info here first. Thanks!!!!!

The bakery I work at bakes their full sheet cakes in a full sheet pan. That's 18X26 inches. For half sheets we cut a full sheet in half. For quarter sheets we cut a half sheet in half. So the half sheets are 18X13. Quarters are 13X9. Same as what you are doing. Although to be honest when I'm cutting, I'm not exactly measuring. So the measurements may be a little off, but it's about what I described.

Thank you so much for your input! I think I remember something about our local bakers using something smaller than what you and I are doing. I will check tomorrow and know for sure. I know that I cannot do a full sheet for $50 like they do!