Eight-inch cakes can be eaten by 3-5 people and ten-inch cakes can be eaten by 5-8 people. The diameter of an eight-inch cake is about 20 cm, and that of a ten-inch cake is about 25 cm. The weight of an eight-inch cake is about 2 pounds, and that of a ten-inch cake is about 3 pounds.

The conversion relationship between cake inch and centimeter is: 1 (inch) inch =2.54CM.

8 inch cake, standard size = 8 * 2.54cm = 20.32cm..

10 inch cake, standard size =10 * 2.54cm = 25.4cm.

There is a uniform standard for the size of birthday cakes in the market, which generally has several specifications, such as 6 inch, 8 inch, 10 inch, 12 inch, 14 inch and so on. 6-inch birthday cake is enough for 1-3 people, suitable for couples to celebrate their birthdays; An 8-inch birthday cake is enough for 3-5 people, which is suitable for families to celebrate their birthdays. 10 inch birthday cake is enough for 5-8 people, suitable for celebrating birthdays with classmates and colleagues in the dormitory; And 14 inch birthday cake is enough for 15-20 people, which is suitable for large-scale birthday celebrations.