2 ply bristol board 100 pack is great for projects, signs and art projects. 100 pack size is great for larger projects or multiple classrooms at an economical price. or Poster board is available in 7 bright colours - canary, pink, blue, white, red, green and assorted. Sheet size is 57cm x 72cm (221⁄2" x 281⁄2"). 100/pkg.