For a cake that can be eaten by eight people, it is best to buy an 8-10-inch cake.

Determining the size of the cake needs to consider the following factors, such as each person's food intake, the shape of the cake, the number of layers of the cake, etc. Generally speaking, the shape of a cake for eight people should be round or square, which makes it easier to divide evenly. The cake should be between 8-10 inches in diameter or side length to ensure there is enough cake for everyone.

If the cake has multiple layers, each layer should be between 2-3 inches. This will ensure the cake is the right height for easy cutting and eating. It should be noted that the above are only reference suggestions. The specific cake size should be adjusted according to the actual situation. For example, if there are children participating, the cake size can be increased appropriately.

Things to note when purchasing cakes

1. Appearance: The appearance of the cake should be beautiful and neat, with no obvious deformation or damage.

2. Smell: Fresh cakes should have a sweet smell. If there is a peculiar smell or a moldy smell, then you should not choose it.

3. Touch: The texture of the cake should be soft and delicate, and the taste should be rich. If the cake feels sticky or dry, then you should not choose it.

4. Materials: The raw materials of the cake should be fresh and pure, not expired or spoiled, especially the cream on the cake should be fresh cream.

5. Shelf life: The shelf life of cakes should be within the validity period. Expired cakes will not only taste bad, but may also have food safety hazards.