what size round cake for 20 people
Size, Shape & Numbers. 1  8Ã12â³ single layer cake feeds 15-20 people. 2  12Ã16â³ single layer cake feeds 40-60 people. 3  12Ã16â³ double layer cake feeds 40-60 people. 4  16Ã24â³ single layer cake feeds 80-100 people. 5  16Ã24â³ double layer cake feeds 80-100 people.