TREND enterprises, Inc. Graphing Grid (1 1/2" Squares) Wipe-Off Chart, 22" x 28" Plot your own graphs on this dry-erase chart. 1.5" squares with unlabeled axes. Jumbo size allows multiple people to use chart; can be easily viewed from a distance. Extra Value: reproducible activities on chart back. Durable cardstock. 22" x 28". Stores easily in chart-size File 'n Save System Box.