From Magna-Tiles®, this set features: Recommended for ages 3 years and up 14 small squares 2 large squares 4 isosceles triangles 4 right triangles 8 equilateral triangles Designed for little hands, kid-friendly shapes magnetically connect with a “click” and are suitable for adventures inside or outdoors in the wild of your own backyard STEM approved: encourages development of  math, science, spatial, and tactile skills and fine motor skills made with safe, durable materials free of latex, phthalates, and BPA, and constructed with food-grade ABS plastic  Package weight: 3 lbs / 1.4 kg Package measurement: 16 x 1.5 x 12 inches Item measurement: each shape has a base measurement of 3 inches / 7.62 cm Compatible with all Magna-Tiles® Imported. *Returns not accepted on any opened, used, or defective product. Contact manufacturer customer service directly for defective products/parts.