3 8 Foam Core Board, I would think Gator Board which is much harder and stronger would be a better choice.

Small Foam Boards in Bulk, 20 x 30 Mount Boards, Bnding101.com

Select from the product options below. Choose or edit your design in the design tool, upload your own art or make a custom request!,

Gatorboard

☑️ 𝐏𝐑𝐄𝐌𝐈𝐔𝐌 𝟏𝟓 𝐏𝐀𝐂𝐊: This foam board comes in a comprehensive 15-pack, each sheet crafted from high-quality polystyrene foam that boasts both

Excelsis Design 15 Pack Foam Board 8x10 Inches | White Foam Board 3/16 Inch Thick White Core Mat | Backing Board for Presentations, Signboards, Arts

PVC vs GATOR BOARD vs FOAM BOARD: which is the best for your sign

Foam Core Signage, Material Options

LIGHT WEIGHT - 3/16 thickness (8 PIECES) WARP RESISTANT, STRONG AND RIGID CAN BE USED FOR DISPLAY IN PORTRAIT OR LANDSCAPE NOT TO BE CONFUSED WITH

Gator Board 16 X 24 - White (8 Pieces)

Gator Foam - Versatile Boards for Artists - Jackson's Art Blog

Foamboard vs Gatorboard

【Premium 20 Black Foam Board Sheets】Lightweight, rigid and durable; Measures 11-1/32”x 14”, 3/16 inch thick. 【Black Foam Board 11”x14”】Ideal for

20 Pack 11x14 inch Black Foam Boards, Foam Core Backing Boards 3/16 Inch Thick Double

Custom Foam Core Printing: High-Quality Signs and Displays