Amazon.com : Union Premium Foam Board 18 x 24 x 3/16" 10-Pack : Matte Finish High-Density Professional Use, Perfect for Presentations, Signboards, Arts and Crafts, Framing, Display (White, 18x24) : Office Products
18" X 24" Foam Core Direct Print
18" x 24" Foam Board Rectangle Signs – Cdesigns Print
Amazon.com: Golden State Art, Pack of 10, 1/8" Thick, 18x24 White Foam Boards (18x24, White) : Arts, Crafts & Sewing
18x24 Elmer's Foam Board
18 x 24 Foam Core Mounted Poster
Elmer's Pre-Cut Foamboard - 18" x 24" x 3/16", White, Pkg of 2 Sheets | BLICK Art Materials
3/16" Color Foam Core Boards :18 X 24 - BOXFORLESS.COM
Amazon.com : Excelsis Design 15 Pack Foam Board 18x24 Inches | White Foam Board 1/8 Inch Thick White Core Mat | Backing Board for Presentations, Signboards, Arts, Display and Crafts with Double-Sided
3/16" Black 1 Side Self Adhesive Foam Core Boards :18X24
18 X 24 X 3/16 White Gator Board -8 Pack | Gatorfoam