Silverlake Craft Foam Block - 14 Pack of 11x17x0.5 EPS Polystyrene Sheets for Crafting, Modeling, Art Projects and Floral Arrangements - Sculpting Sheets for DIY School & Home Art (14 Pack) :
Styrofoam Sheets (12 inches X 12 inches X 1/4 inch Thick) - 8-Pack | eBay
6 Pcs 1 Thick Foam Board Sheets, 17x11 Rectangles for DIY Crafts, Art Supplies, PACK - QFC
Amazon.com: Juvale 1-Inch Thick Foam Rectangle Blocks for Crafts, Diorama Supplies, Centerpieces, School Projects, Packaging, Polystyrene Boards for DIY Sculpture (12x4x1 in, 12-Pack) : Arts, Crafts & Sewing
80" x 20" (~200 x 50 cm) - Firm Grey Foam Sheet For Use In Upholstery - SELECT THICKNESS - Foam for Various Applications (1" (2.5 cm) Thick Foam) : Amazon.co.uk: Home & Kitchen