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Standard Poster Sizes - Complete Guide
Foam Board 30" x 40", 1/2" thick, White
Elmer's 28" X 40" Tri-fold Foam Presentation Board - White : Target
White Foam Board - 32" x 40" | Hobby Lobby | 500868
Buy the Tri-fold Display Cardboard Panel for Presentation – G8Central.com
Royal Brites Tri Fold Project Board 28 x 40 White - Office Depot
Amazon.com: BAZIC Trifold Presentation Board 28" X 40" White, Tri-Fold Corrugated Poster Boards, Cardboard for Display Boards Science Fair Art Project, 30-Pack : Everything Else
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