Poster Palooza 12x18 Distressed/Aged White Wood Shadow Box Frame - UV Acrylic, Acid Free Backing, Hanging Hardware Included! This Shadow Box Frame Has Interior Dimensions of 12x18 Inches. Overall dimensions 12.875x18.875 Inches. Moulding Width: 0.875 Inches - Rabbet Depth: 1 1/8 Inches UV Resistant Frame Grade Acrylic Sheet & Acid Free Backing Included. Hanging Hardware included for vertical or horizontal display.