School Smart Spectrum Mosaic offers artful fun for groups big and small! Each mini grid square piece measures 3/4 inches and has a different color on the flip side. Pack is great for group activities, lessons on color theory, arts and crafts, and so much more. Students can also arrange mosaic bulk by primary and secondary colors or row up from cool to warm tones. Paper squares come in a range of 12 colors (plus black and white). Sold as pack of 4000 paper mosaic pieces.