Multiplication Chart Stamp is great for creating a quick multiplication chart. 1-100 Chart Stamp features numbers 1-100 in a block grid. Great for student quick reference. 100 Block Stamp features a 100 block grid for students to create their own number grid. Set of three stamps includes: Multiplication, 1-100, and 100 Block. All three stamps measure 3 3/4" x 3 3/4" each