These art portfolio cases are the perfect sign cases for storing and sending valuable and irreplaceable works of art. The sign cases can also be used to deliver important signage to clients, or to move valuable signs or artwork to galleries or other buildings. In addition to using these sign cases as transport cases, the art portfolio cases can also be used to keep works of art in storage in a warehouse or other establishment, keeping them protected from damage that might occur. Road Cases USA offers a variety of shapes and sizes for all of our art transport cases from 20” x 16” to 40” x 30”. The art portfolio cases feature an overlapping PCV lid that will keep your artwork moisture free. Contact us for information on custom sizing.