Choose this according to your actual needs. If it's just your family who stutter cake. Considering the premise of economy and no waste, it must be enough to buy a six-inch one. But if all three of you prefer to eat cakes, let's talk about it. There is also that children will have good friends. If you're willing to share. You can also buy an eight-inch cake for the children's good friends to share. In this way, your child's birthday is also very happy.