Amazon.com : Trifold Poster Board 36" x 48" White Presentation Board Science Fair Display Boards - for School, Fun Projects and Business Presentations - by Emraw : Office Products
Two Cool Tri-Fold Poster Board, 36 x 48, White/White, 6/Carton - River City Office Supply
A1 Poster Board - Surf & Turf Canada
Hilroy 4-Ply Poster Board, 22 X 28-Inch, 14 Point, 25 Sheets, Purple - ACCO Canada
ARTSKILLS Heavyweight White Poster Board, 22" x 28" - Walmart.ca