Clean, geometric silhouettes and bold colors were central to the Mod fashion craze of the 1960s on both sides of the Atlantic. Florence Eiseman created A-line, trapeze-shaped dresses for girls before French designers Coco Chanel and Christian Dior made them fashionable for adult women. Eiseman’s focus on geometric shapes and bold colors gave the style a playful, American twist. Her designs focused on color blocks—in some cases inspired by the paintings of Piet Mondrian—bold geometric shapes, and unusual appliqués such as a stylized Dalmatian or abstract butterflies. The A-line, which had been designed for the round bellies of young girls, became a recognizable profile that elevated her children’s fashions to the trendiest of modernist aesthetics.