Expanded PVC Sheet – Lightweight Rigid Foam – 6mm (1/4 inch) – 12 x 12 inches – White – Ideal for Signage, Displays, and Digital/Screen Printing - Walmart.com
Amazon.com: Mega Format Expanded PVC Plastic Sheets - 8" X 10" Rigid White Sheet for Crafts, Signage, & Displays - Sintra, Celtec PVC Board - Waterproof for Outdoors Use - 1/8" 3mm
Amazon.com: 4 Pack ABS Plastic Sheets 12" x 12" x 0.08", Thick Black Textured Hard Plastic Sheeting for DIY Materials Home Decor Handcrafts, Flexible Than Plexiglass Moldable Than Acrylic Sheet : Industrial
Expanded PVC Sheet – Lightweight Rigid Foam, Durable – 3mm (1/8 Inch) – 24 x 48 Inches – White – Ideal for Signage, Displays and Digital/Screen Printing (2 Pack) - Walmart.com