Poster Palooza 20x30 Contemporary Silver Wood Shadow Box Frame - UV Acrylic, Acid Free Backing, Hanging Hardware Included! This Shadow Box Frame Has Interior Dimensions of 20x30 Inches. Overall dimensions 21x31 Inches. Moulding Width: 1 Inches - Rabbet Depth: 1 Inches UV Resistant Frame Grade Acrylic Sheet & Acid Free Backing Included. Hanging Hardware included for vertical or horizontal display.