FloraCraft Styrofoam Sheets 1 in., 12 in. x 36 in. (Pack of 4) - Walmart.com
FUTURE FOAM 2 in. Thick Multi-Purpose Foam 10030BULK2 - The Home Depot
Amazon.com: AMZQNART Craft Foam Blocks, 2 in Thick 17x11" EPS Polystyrene Rectangle Foam Blocks Packs of 3 Pcs for Art Sculpting, Sculpture, Modeling, School and Home DIY. : Arts, Crafts & Sewing
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
6 Pack White Foam Sheets 1 Inch Thick, Polystyrene Rectangle Blocks for DIY Crafts, Art Supplies, Packing (12x4 Inches) - Walmart.com
DirectFloral. Styrofoam™ Sheet - 2"x 12"x 36" Green
Amazon.com: Silverlake Craft Foam Block - 3 Pack of 11x17x2 EPS Polystyrene Blocks for Crafting, Modeling, Art Projects and Floral Arrangements - Sculpting Sheets for DIY School & Home Art Projects :