Young learners can explore patterning, sorting, classifying and attribute recognition. Pattern Blocks stickers can also be used to introduce and reinforce geometry concepts and measurement concepts such as shapes, area, and symmetry. Perfect for sorting by size, color, and shape, this set of pattern block stickers includes 900 reusable stickers in six colors. Great for personalized room decorations, too. Each sticker measures approximately 1 in. to 2 in. (2.5 to 5cm).