Sheet cakes come in three standard sizes: quarter (9 x 13 inches), half (13 x 18 inches), and full (18 x 26 inches). The number of servings depends on the size of the slices and the cake's overall ...

Costco Discontinues Half-Sheet Cake, Apparently Because of Covid-19. ... Costco’s half-sheet cakes, which were advertised as serving 48 people, cost less than $20, customers said.

Its sheet cakes were advertised as serving 48 people, The New York Times reported. Like Costco, Sam’s Club and Kroger stores have stopped selling sheet cakes, CNN reported.