This is a very basic question I know, but I just started doing cakes as a hobby a couple years ago and now and getting requests for event cakes. I usually only do one 9" circle cake or shaped cakes. I just bought square pans to experiment with those and now need to get some sheet pans. What are the dimensions of a 1/2, 1/4 or full size sheet cake?
There are several threads on this. I wrote this in many of them:
1/4 Sheet = 9x13
1/3 Sheet = 11x15
1/2 Sheet = 12x18
Full Sheet = 16x24 (baked in 18x26 Bun pan with bakeable cardboard tray).
Additional full sheet info:
A commercial Bun pan is 18" x 26" (outside measurement), and because they are tapered for nesting or making them stackable, the inside measurement is 16.5" x 24.5".
A commercial full sheet is 16" x 24". They are baked in 16" x 24" bakeable cardboard trays that fit into the Bun pans (flat surface portion) which are used during baking for support and handling purposes.
A true commercial full sheet (16" x 24") serves 96 (unit wt. 106-124 oz.).