Which fashion trend influenced the marketing of razors for women in the early 20th century?

The marketing of razors for women in the early 20th century was significantly influenced by the trend of short hemlines and sleeveless dresses. This era saw a shift in women's fashion that emphasized more liberated and revealing styles, particularly during the 1920s with the flapper movement. As hemlines rose and sleeves disappeared, there was an increasing exposure of women's legs and underarms, which created a demand for personal grooming products, including razors. The visibility of these areas in fashionable clothing led to an association between femininity and the need for hair removal, prompting targeted marketing of razors specifically for women.

This trend directly correlated with the changing societal norms regarding women's roles and appearances, leading brands to position their products as essential tools for maintaining a fashionable and modern look. The emphasis on smooth skin as a beauty standard aligned well with the popular fashion choices of the time, making this choice the most relevant answer.