WILTON-Cupcake Window Box. Create the perfect gift with window boxes! Each one has a window on the top so you can see the yummy treat inside and an optional insert can be used to hold one cupcake perfectly in place. Dimensions of the outer box are 4-1/2x4-1/2x3 inches. Each package contains three boxes and three cupcake inserts. Pattern: Black and White Dots. Imported.