Model essential base ten and place value concepts on your whiteboard so the whole class can see. Real photos of base ten blocks go beyond typical base ten magnetics to helps students better visualize the 3-D representation of math concepts. Set includes 131 magnetic pieces: 100 units, 20 rods, 10 flats, 1 cube. Flats measure 6.75"L x 6.75"H; units measure 0.625"L . Grades 1+