Amazon.com : Union Strong Foam Board 24X36 3/16" 10-Pack : Matte Finish High-Density Professional Use, Suitable for Presentations, Signboards, Arts and Crafts, Framing, Display (White, 24 x 36 x 3/16") : Office Products
Foam Board White 24"x36" - 1/8" Thick (25)
Foam Core Backing Board 3/16" White 24x36- 10 Pack. Many Sizes Available. Acid Free Buffered Craft Poster Board for Signs, Presentations, School, Office and Art Projects - Walmart.com
Foam Board White 3/16in 24x36 (Box of 25) | plazaart.com