The first book says that the school winter uniform is composed of "black gymslips, black stockings, black hob-nailed boots, grey shirts and black-and-grey ties". The first book also postulates that "the only touches of colour the uniforms were the sashes round their gymslips – a different colour for each house, although the houses are not named – and the school badge, which was a black cat sitting on a yellow moon". In the summer term, originally the girls wore grey-and-black checked dresses, but this was changed from "Worst Witch All At Sea" onwards to a simple black dress as Ms Hardbroom felt that the original design was too frivolous.