Custom Foam Core Printing: High-Quality Signs and Displays
Foam Core Backing Board 3/8" White 24x36- 25 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Amazon.com : 30 Pack White Foam Core Board 20 x 30 Inch Foam Core Backing Board Sheet 3/16 Inch Thickness Polystyrene Poster Board for Presentations, Signboards, Arts and Crafts, Framing, Display, Projects : Office Products
Create Your Own 18" x 24" Square Foam Core Board | Zazzle
1/8" White Foam Board | Shop 1/8" Ultra Thin White Board in Pre-Cut Sizes at Foamboards