Complex sentence: The first fashions worn with hourglass corsets, in around 1830, emphasized width-they tended to have very wide skirts, large sleeves and sloping shoulders-and these elements contrasted with the narrowed waist, making it appear smaller than it actually was.
Split into simpler sentences: The first fashions worn with hourglass corsets, around 1830, emphasized width-they tended to have very wide skirts, large sleeves and sloping shoulders. These elements contrasted with the narrowed waist, making it appear smaller than it actually was.