Hair Culture and Business

Growing and wearing long hair is a lifestyle practiced by millions worldwide. It was almost universal among women in Western culture until World War I. Many women in conservative Pentecostal groups abstain from trimming their hair after conversion (and some have never had their hair trimmed or cut at all since birth). The social revolution of the 1960s led to a renaissance of unchecked hair growth. Hair length is measured from the front scalp line on the forehead up over the top of the head and down the back to the floor.
source:wikipedia

These women are favorites of hair care products industry.