White High Impact Polystyrene 030 inch 50 x 99 25 sheets
Grimco | Duratex Polystyrene Sheets - Double White
POLYSTYRENE FOAM SHEETS - Foam Mart
1 Inch Thick Foam Board Sheets, 17x11 Polystyrene Rectangles for DIY Crafts, Art Supplies, Sculpture (6 Pack)
Amazon.com: Silverlake Craft Foam Block - 6 Pack of 11x17x0.5 EPS Polystyrene Sheets for Crafting, Modeling, Art Projects and Floral Arrangements - Sculpting Sheets for DIY School & Home Art (6 Pack) :