Our Girl's Uniform For Olympic Games: The new costume shown for the first time at an Oxford street store today. It was chosen by members of the team from a selection submitted by the store, and the dress is made from washable material.A new costume has been designed for wear by our women athletes who will be taking part in the Olympic Games. It consists of a simply cut open-neck white dress with a tight-fitting navy blue jacket, with beret to match. Both jacket and beret bear a Union Jack with the five Olympic rings woven underneath. May 20, 1948. (Photo by Fox).