I have a birthday cake order due for May 22nd. There will be about 60 guests at the party. They have requested a sheet cake, but everyone seems to have a different idea of what that it. What dimensions sheet cake would I need to make to fill this order? Thanks for the info.

First, stop using terms like "half" or "full" sheet cakes. The gen'l public uses those terms but have no idea what it means or what sizes those are. Drives me insane. (See my story about this in the links below .... guy ordered a "full" sheet cake to serve TEN people!")

Here's a link with the info. There's also a link inside this thread with the history of why the sizes are what they are: http://cakecentral.com/cake-decorating-ftopicp-6802749.html#6802749

Thanks IndyDebi. That's why I have the question. Everyone has different ideas about what a "full" or "half" sheet cake are. I'd rather just use dimensions of the cake pan. What would you suggest to feed 60 people? I recognize your name from here and trust your judgement over my rookie ones.

I'll certainly bow to anything Indydebi might say differently, but since she's not here at the moment I would use the industry standard "party serving" which will yield 60 servings from an 11" x 15" sheet cake. Six across the 11" side by 10 across the 15" side and you've provided exactly what your client is requesting.

Based on the industry standard 8 cu. in. servings:
http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm
you could use a single-layer 1/3 sheet (11x15) and a single-layer 1/4 sheet (9x13).