Amazon.com: Foam Boards White Foam Core Backing Boards, Silver Craft Knife with Protective Cap and 12 Inch Stainless Steel Ruler for Art Presentations Crafts Display Favors(White, Silver, 12 x 10 x 0.2
BAZIC Red Foam Board 20" X 30", Colored Foam Boards 3/16 Inch Thickness, 25-Pack - Walmart.com
3/8" White Acid Free Buffered Foam Core Boards : 48 X 48 - BOXFORLESS.COM