A window covering cutting machine is disclosed that has a support table, a cutting mechanism adjacent the support table and a plurality of moveable stops moveably connected to at least one of the cutting mechanism and the support table. The support table has a surface on which at least a portion of a window covering work piece can be placed. The cutting mechanism has a housing with a plurality of openings sized to receive at least a portion of a window covering work piece. The cutting mechanism also has at least one cutting device configured to cut portions of a window covering that extend through any of the openings. One stop is aligned with each opening and is independently moveable relative to the housing and the other stops.