Rigid boxes, also known as set-up boxes, are a type of packaging made from sturdy paperboard. They are typically four times thicker than the average folding carton, providing a solid structure that does not easily collapse. Rigid boxes are often covered with decorative paper, fabric, or leather, offering a luxurious look and feel. Unlike folding cartons, rigid boxes are pre-assembled and do not require any setup, making them a convenient option for high-end packaging needs.