Kroes has made the covers of Time, Vogue, Harper’s Bazaar, and Numero. She also appears regularly in the Victoria’s Secret catalog and was featured in their fashion show in 2005 and 2006. Kroes has also been in campaigns by Gucci, Calvin Klein, Tommy Hilfiger, Escada, Dolce & Gabbana, Valentino, Versace and Neiman Marcus.

In 2005, Kroes was selected as Model of The Year on Vogue.com by readers. Kroes was named spokesmodel for the Calvin Klein “Eternity” fragrance campaign in August 2005 and, in April 2006, she signed a three-year contract with L’Oréal Paris. Kroes can currently be seen in the company’s commercials alongside Eva Longoria and Kerry Washington.