Sheet Cake Serving Sizes Full Sheet 1/2 Sheet 1/4 Sheet SERVES SERVES SERVES 72-98 STARTING AT $250.00 36-50 STARTING AT $125.00 96-192 STARTING AT $450.00 12 X 18 X 4 The A series paper sizes are defined in ISO 216 by the following requirements: The length divided by the width is 1.4142; The A0 size has an area of 1 square metre. Each subsequent size A(n) is defined as A(n-1) cut in half parallel to its shorter sides. The standard length and width of each size is rounded to the nearest millimetre. Sheet cakes typically come in quarter, half and full sheets. A quarter sheet is 9"x13", a half sheet is 13"x18" and a full sheet is 18"x26". Sheet cakes are usually 2 inches in height. The number of servings each cake has is dependent on the serving size.

Dec 05, 2019 · A "full" sheet cake pan is typically about 18 inches (45.72 centimeters) by 26 inches (66.04 centimeters), though the length can also be only 24 inches (60.96 centimeters).