In the third film of the Harry Potter series, the style of the Hogwarts school scarves changed from a solid striped pattern, to one featuring sets of trapped bar patterns. These scarves are long and full scarves (actors in the film often wind them several times around their necks). Atypically Knit used to have a pattern that very closely follows the movie style of the scarves, as well as give yarn, needle and color suggestions for the four house colors. See the link below for the full pattern.