The wooden frame has three main parts: the sill, or horizontal strip along the bottom of the frame; the jamb, the vertical sides of the frame; and the head, the top horizontal strip on the wooden frame. The sash also has several components.Stiles are the vertical sections of the sash.A window frame is the combination of the head, jambs and sill that forms a precise opening in which a window sash fits. So if you look at our handy diagram, the frame is the outer boarder of the window