These sets provide the perfect foundation for a diorama or display. The backdrop fits snuggly into the grooves on the molded, black base and provides a durable backdrop for painting, decorating and labeling. The backdrop can be cut to any shape and the base has a molded placard for project labeling. The assembled size of the small project base and backdrop measures 12.5"w x 9.25"d x 9.625"h and the project area measures 10.75"w x 7.375"d x 7.5"h. The assembled size of the large project base and backdrop measures 18"w x 12.5"d x 13.125"h and the project area measures 16.25"w x 10.75"d x 11"h.