Amazon.com: Mega Format Expanded PVC Plastic Sheets - 12" X 12" Rigid White Sheet for Crafts, Signage, & Displays - Sintra, Celtec PVC Board - Waterproof for Outdoors Use - 1/4" 6mm
Amazon.com: MIKING 6 Pieces 8" x 10" Plexiglass Sheet, 1/8” Thick (3mm) Transparent Acrylic Sheet with Protective Paper Use for Crafting Projects, Signs, DIY Display Projects… : Arts, Crafts & Sewing