Poster Palooza 16x16 Rustic Black Wood Shadow Box Square Frame - UV Acrylic, Acid Free Backing, Hanging Hardware Included! This Shadow Box Frame Has Interior Dimensions of 16x16 Inches. Overall dimensions 16.75x16.75 Inches. Moulding Width: 0.75 Inches - Rabbet Depth: 1 Inches UV Resistant Frame Grade Acrylic Sheet & Acid Free Backing Included. Hanging Hardware included for vertical or horizontal display.