Petit Bateau provides a fundamental part of the classic French wardrobe from cradle to teen and beyond. The signature T-shirt—cut close to the body, with smallish shoulders—works equally well with school uniforms or vintage Chanel. High-grade cotton clothes follow designs that haven't changed in decades (think onesies and pajamas for newborns, underwear sets, and dresses with tiny straps for summer); however, lines in cotton-silk or cotton-cashmere and popular collaborations with chic designers like Carven or Tsumori Chisato mean there's now even more in store. There are boutiques in all the major shopping neighborhoods. Stock up: if you can find this brand back home, the prices are sure to be higher.