Blue plastic shapes represent common shape families. Green plastic shapes show students regular and irregular versions of the same shape. Use the double-sided poster to introduce the names of the shapes! Plastic shapes are numbered on one side to correspond to the matching shape on the included poster. Different size circles and squares are included and shown on the poster. The shapes are the same but the size is different (in proportion). Set includes 4 packs of 2D plastic shapes (38 pieces per pack) and 4 double-sided, color-coded plastic posters measuring 8.25" x 11.75". Small square measures 1" and large square measures 1-.75". Grades PreK and up.