|  Here's a good example of a market sizing. How many people live in  China? A billion. Because the population of China is young, a full 600  million of those inhabitants might be of child-bearing age. Half are  women, so there are about 300 million Chinese women of childbearing  age. Now, the average family size in China is restricted, so it might  be 1.5 children, on average, per family. Let's say two-thirds of  Chinese women have children. That means that there are about 200  million children in China. How many of those kids are under the age of  two? About a tenth, or 20 million. So there are at least 20 million  possible consumers of disposable diapers. To summarize:
 1 billion people x 60% childbearing age = 600,000,000 people
 600,000,000 people x 1/2 are women = 300,000,000 women of childbearing age
 300,000,000 women x 2/3 have children = 200,000,000 women with children
 200,000,000 women x 1.5 children each = 300,000,000 children
 300,000,000 children x 1/10 under age 2 = 30 million
 |