WILTON-Treat Boxes. These Halloween themed boxes are fun to fill with candies, cookies, or cupcakes! The lids have a clear window so you can easily see the yummy treats inside! Each box measures 6-1/4x6-1/4x3 inches and includes an optional insert for holding up to four cupcakes in place. This package contains three boxes and three cupcake inserts. Design: Spider. Imported.