Sizzix Movers and Shapers are creativity in motion! With these movable magnetic dies, now you can create a card or envelope with a window anywhere you want for a truly customized shape-cutting experience. The window die must be used in any one of the Movers and Shapers base dies or base trays, which are compatible with the BIGkick, Big Shot and Vagabond machines (with a pair of appropriately sized Cutting Pads).The measurement of this die-cut shape is approximately 1 1/2" x 7/8" to 2" x 2".