Poster Palooza 15x21 Contemporary Black Wood Shadow Box Frame - UV Acrylic, Acid Free Backing, Hanging Hardware Included! This Shadow Box Frame Has Interior Dimensions of 15x21 Inches. Overall dimensions 16.5x22.5 Inches. Moulding Width: 1.5 Inches - Rabbet Depth: 1 Inches UV Resistant Frame Grade Acrylic Sheet & Acid Free Backing Included. Hanging Hardware included for vertical or horizontal display.