Cake sizes converted to centimeters are all expressed in diameter, with one inch equaling 2.54 centimeters. So the diameter of a 4-inch cake would be 10.16 centimeters, a 5-inch cake would be 12.7 centimeters, and a 6-inch cake would be 15.24 centimeters.

4-5 inch: a round cake is 10-12 centimeters in diameter and is good for 1 person.

6-inch: round cake diameter 15 centimeters, about 2-4 people to eat, suitable for birthday parties, Valentine's Day, Mother's Day and other kinds of festivals.?

Cake size comparison:

The "inch" of the cake refers to "inches", and 1 inch is equal to 2.54 centimeters.

6 inches = 15.24cm: for about 2-4 people, suitable for birthday parties, Valentine's Day, Mother's Day and other festivals.

8 inches = 20.32cm: 4-6 people serving, suitable for birthday parties, various festivals, visiting friends and relatives.

10 inches = 25.4cm: 6-10 people serving, suitable for birthday parties, various festivals, visiting friends and relatives.

12 inches = 30.48cm: 10-12 people serving, suitable for birthday parties, various festivals, visiting friends and relatives.

14 inches = 35.56cm: 12-14 people serving, suitable for company, classmates gathering.

16 inches = 40.64cm: 14-16 people serving, suitable for all kinds of medium-sized celebrations.

18 inches = 50.5cm: 18-22 people serving, suitable for all kinds of medium-sized celebrations.