Amazon.com : AKOLAFE 30 Pack 10x8 Inch Foam Boards, 5 mm Thick Foam Core Board 1/5 Inch White Foam Sheet, White Polystyrene Poster Board Signboard for Presentations, School, Office & Art Projects : Office Products
Polystyrene sheet WHITE (1p) - MakerBeam
4mm White Corrugated Sign Blanks | 24" x 18" | 3-Pack | US
White High Impact Polystyrene 060 inch 50 x 99 25 sheets
Polystyrene - White – MakerStock
Amazon.com: DNB Craft Foam Board - 3PCS 17X11X2 Inch Polystyrene Rectangle White Thick Foam Sheets - Crafts and Arts Supplies : Arts, Crafts & Sewing
White Styrene 0.020 Thickness 12 X 12 HIPS Polystyrene Plastic Sheets, Thermoforming DIY Craft Materials - Etsy
Polystyrene Sheet, White - 12.7mm Thick (1/2 Inch) x 25cm Square - Radiation Products Design, Inc.
6 Pack White Foam Sheets 1 Inch Thick, Polystyrene Rectangle Blocks for DIY Crafts, Art Supplies, Packing (12x4 Inches) - Walmart.com
White Styrene .060" x 12" x 12" plastic sheet High Impact Polystyrene (HIPS) | eBay